Motor Mount modifications for 340/360 into Early A

As you may know, if you want to swap a 340 or 360 into your early A-body, you need to take original 273 motor mounts and modify the passenger side mount. This modification is pretty simple and outlined elsewhere, like here -> http://tinyurl.com/cyo8w and here-> http://www.enbcom.com/discus/messages/2/456.html

Anyhow, you can buy prefabbed mounts at Shumacher -> http://www.engine-swaps.com/ or make your own.

There's a guy on ebay selling them too.... -> ebay #4596986266

HOWEVER I was looking at these and the guy has cut off one tab, forcing you to put the mount on in reverse!! DO NOT BUY THESE

It will cause the motor to sit at a slight angle...not necessarily the end of the world, but not really a good thing either! I emailed the guy and he was rather defensive at first, but then he replied admitting the mistake and then he pulled the auction. He says he's sold 4 of these already...uh oh...glad it wan't to ME!

good lookin out!!!

I don't know anything about early A-bodies but if you have one with a 273 why do you have to do anything to the passenger side to put a 340/360 in?

I know the ears on the drivers side of a 340/360 block are closer together than the 273/318 but the passenger side of the block is the same but that can be handled with a simple spacer.

Curious minds want to know! :)

the hole orientation... the pass side will only be held with 2 bolts if you use a 273 mount...( the side with 2 holes needs to be on the other side.)

If I visualize the pictures in the link above correctly am I seeing two ears with two holes each on the passenger side of the 273 block? And, the mount bolts to the two rear holes and one front hole?

I was always under the belief that 273/318/340/360 blocks all had the same two front one rear hole arrangement on the passenger side. The drivers side has the same arrangement but the spacing front to back of the ears on the 340/360 is narrower than the 273/318.

DGC333, you are right BUT that photo (posted by me) shows the 273 in my car with a 4 holed mounting ear on the passenger side. I believe this is an oddball case (still trying to figure out why). I believe most 273's have 3 holes, just like 340's and 360's, but on the 273 usually has two holes in the back ear and one hole in the front ear. 340/360 is opposite so you have to modify the mount.

back up to the top, for more to see :)

I have a 64 Dart GT with a 340 and a stock motor mount on the passenger side but on the DRIVERS SIDE I HAVE JUST THE METAL PART OF THE PICK UP TRUCK MOUNT !!! ONE SOLID MOUNT!!! NO I REPEAT NO RUBBER MOUNT ON THE DRIVER SIDE! BOLTS IN JUST LIKE IT GREW THERE FROM THE FACTORY. It would be very easy to recommend yhat if you were to put a HI-PO 318 or 273 into one of these cars the solid mount would seem to be very practical just use a 318 drivers side mount.

I have a 64 Dart GT with a 340 and a stock motor mount on the passenger side but on the DRIVERS SIDE I HAVE JUST THE METAL PART OF THE PICK UP TRUCK MOUNT !!! ONE SOLID MOUNT!!! NO I REPEAT NO RUBBER MOUNT ON THE DRIVER SIDE! BOLTS IN JUST LIKE IT GREW THERE FROM THE FACTORY. It would be very easy to recommend yhat if you were to put a HI-PO 318 or 273 into one of these cars the solid mount would seem to be very practical just use a 318 drivers side mount.

You got a pic of that set up. I have a set of the Schumacher mounts for the 340, but got rid of the car before I could use them.

I can get a pic, but I don't yet know how to post the pic on the site! If you can help me with that I'll gladly post the pic and all of my car with fenderwells and all!

I can get a pic, but I don't yet know how to post the pic on the site! If you can help me with that I'll gladly post the pic and all of my car with fenderwells and all!

Lotsa hints here...

http://www.forabodiesonly.com/mopar/forumdisplay.php?f=11

Not sure about the early A's ,but the drivers side is the one that is different.
The passanger side uses the same bracket on all the small blocks.What you need is a 340 a-body drivers side mount.They can be hard to find,or schumacher will sell just that side.

The guy on E-bay (texas something) is a knucklehead.He states "this is the bracket you need to do a 273/318 to 340/360 swap".
When in fact the mount he is selling is the passenger side,and you already have it.

Not sure about the early A's ,but the drivers side is the one that is different.
The passenger side uses the same bracket on all the small blocks.What you need is a 340 a-body drivers side mount.They can be hard to find,or schumacher will sell just that side.

The guy on E-bay (texas something) is a knucklehead.He states "this is the bracket you need to do a 273/318 to 340/360 swap".
When in fact the mount he is selling is the passenger side,and you already have it.

I have a 67 cuda with 273.

If I install a 360 in my car I will need a 340 passenger side motor mount only or a 340/360 passenger side motor mount ?

Half inch spacing was mentioned above and that the problem could be fixed with spacers. Where would the 1/2" spacers go on the passenger side? Toward the front of the motor or to the rear? Has anyone actually done this?

I noticed on my 273 that it had a bad motor mount and replaced it. It was on the passenger side and for some reason I could never get all three bolts in that mount and the rubber insulator has to go in cocked to one side. All three bolts was never installed just two. I could never get the rubber insulator square with the mounts. Anyone have a idea why that is?

The link I posted above is now found here instead -> http://www.earlyabodyforum.com/board/messages/2/456.html

I have a 67 cuda with 273.

If I install a 360 in my car I will need a 340 passenger side motor mount only or a 340/360 passenger side motor mount ?

Half inch spacing was mentioned above and that the problem could be fixed with spacers. Where would the 1/2" spacers go on the passenger side? Toward the front of the motor or to the rear? Has anyone actually done this?

I noticed on my 273 that it had a bad motor mount and replaced it. It was on the passenger side and for some reason I could never get all three bolts in that mount and the rubber insulator has to go in cocked to one side. All three bolts was never installed just two. I could never get the rubber insulator square with the mounts. Anyone have a idea why that is?

The 273,318,340,360 all use the same mount on the "passenger side".No fabrication,spacers, necessary.

The "drivers side" is where the 273/318 mount is different than the 340/360 mount.The drivers side is where you need an A-body 340 mount.With the 340 mount no spacers are necessary.

If you were to use a 273/318 drivers side mount,on your 340/360,you would need to use a spacer or washers.

Schumacher has both brackets,which are powder coated,with insolaters and mounting bolts for $130.00.Not to bad.Or you can hunt down a A-body 340 mount.

Another potential hiccup is the rear bolt holes on the drivers mount. Some of the 318 bracket have three bolt holes in them not 4. If the bracket has three holes it likely won't line up with the rear mount lug on a 340-360. I have done this to the mounts to get them to work.

Left is the modified, right is the 318 mount.

http://img.photobucket.com/albums/v655/crackedback/Picture003-1.jpg
http://img.photobucket.com/albums/v655/crackedback/Picture002-1.jpg
http://img.photobucket.com/albums/v655/crackedback/Picture001.jpg

DRIVERS SIDE! Oh Ok!

I guess to make sure everything is right and going to fit I would just be better off buying the Schumacher 340/360 mounts and be done with it.

i could have sworn that i only had to modified the drivers side mount when i did the 360 in my 64 valiant... i found the measurements in a mopar chasis or engines book back then.. it was a triangle piece that needed to be welded to the 273 mount. still have the mounts in the shed somewhere so i'll have to dig them out and look.

Another potential hiccup is the rear bolt holes on the drivers mount. Some of the 318 bracket have three bolt holes in them not 4. If the bracket has three holes it likely won't line up with the rear mount lug on a 340-360. I have done this to the mounts to get them to work.

Left is the modified, right is the 318 mount.

http://img.photobucket.com/albums/v655/crackedback/Picture003-1.jpg
http://img.photobucket.com/albums/v655/crackedback/Picture002-1.jpg
http://img.photobucket.com/albums/v655/crackedback/Picture001.jpg


What year are those brackets for? We are talking about the "early" A bodies. 1964 to 1966. Those pictures are not for a 64-66 conversion. 67 up are different brackets and insulators.

This conversation is talking about two different beasts here. There's a difference between pre-'67 A-body and post-'67 A-body. Abodyjoe is right, but he's talking about pre-'67. Johnny dart and crackedback are talking about post-'67.

Yep later ones... sorry I'm out.

Well the topic started with early A's (the title says it) then it got sidetracked. Not that it's a bad thing, but anyone reading it that doesn't know, should know there's a difference. I find all the information useful myself.

hawaii duster I can send you some pic's but need your adress for snail mail if your so trusting.My 340 hasn't moved at all and its NOT A HACK JOB.

If anyone is interested I have a pair of decent early A biskets.

Not sure about the early A's ,but the drivers side is the one that is different.
The passanger side uses the same bracket on all the small blocks.What you need is a 340 a-body drivers side mount.They can be hard to find,or schumacher will sell just that side.

The guy on E-bay (texas something) is a knucklehead.He states "this is the bracket you need to do a 273/318 to 340/360 swap".
When in fact the mount he is selling is the passenger side,and you already have it.

Not true. The passenger side is indeed the different unit. Those images in Neil's original thread are mine (unfortunately so are the sketches and bad penmanship).

The knucklehead is the one who authored the Mopar Chassis manual section on modifying the bracket for doing the swap. It it plain to me that the engineer sent a lacky out to the garage floor with the instruction that he needed to get the dimensions off the "right side mount" and the goofball looked in the engine compartment, looked at his right hand, then took dimensions off the drivers' side mount. ](*,)

The difference between the 273 and 360 block is the configuration of the passenger side ears: the 360 only having one tab on the rear and two in the front, but the original 273 bracket is intended to use two holes in back and one in front. the rubber mounts are the same side to side (regardless of LA motor), but the brackets are indeed different on the passenger side for a 273 versus a 360.

Glad this got bumped again.

I missed it somehow and will be doing the swap soon.
:read2:

Not true. The passenger side is indeed the different unit. Those images in Neil's original thread are mine (unfortunately so are the sketches and bad penmanship).


hmmm.. when i did the 360 in my 64 valiant i left the passenger side (right) stock and i modified the drivers side mount (left) as per an ond mopar chasis book i think it was. now i know when we changed from a 318 to a 360 in djv's 66 cuda we had to modify the passenger side (right) mount... weird man.. i am 100% sure that i didn't touch my passenger mount and only modifies the drivers mount in my 64 valiant

I found that that drawing was wrong also back in 96. Once I figured out that the modification needed to be the passenger side I had it modified and then just built a spacer for the driver side. I since sold those, now have Shumakers (spelling).

I've seen a few early A's with 340's that did not have the passenger side mount modified, but then only two bolts hook up, which I guess is okay but with 10 minutes of modification time you can have all three...isn't that better?

65s said: "I've seen a few early A's with 340's that did not have the passenger side mount modified, but then only two bolts hook up, which I guess is okay but with 10 minutes of modification time you can have all three...isn't that better"

Neil you are 100% correct in stating that the passenger side mount from a pre-67 will bolt to a 340/360 using 2 of the block mounting ears, and that works just fine. Also, as you stated, 10 minutes of modification to the mount by adding a triangle of metal will allow you to use all 3 mounting lugs on the block.

As far as the driver's side 273 mount in an EARLY (66 or older) A body fitting a 360 type block, they DO FIT. The only difference is that there is a space of about 1/4" between the rear mounting lug of the block and the rear of the 273 mount. You can either weld in a piece of metal and re-drill the hole, or use washers to fill the space.

Here's a photo of my original 273 engine mount from my 66 A body, attached to the 1978 motor - 360 cu. in. I can get a photo of the other side later today if anyone wants to have a lookie see.

Not true. The passenger side is indeed the different unit. Those images in Neil's original thread are mine (unfortunately so are the sketches and bad penmanship).

The knucklehead is the one who authored the Mopar Chassis manual section on modifying the bracket for doing the swap. It it plain to me that the engineer sent a lacky out to the garage floor with the instruction that he needed to get the dimensions off the "right side mount" and the goofball looked in the engine compartment, looked at his right hand, then took dimensions off the drivers' side mount. ](*,)

The difference between the 273 and 360 block is the configuration of the passenger side ears: the 360 only having one tab on the rear and two in the front, but the original 273 bracket is intended to use two holes in back and one in front. the rubber mounts are the same side to side (regardless of LA motor), but the brackets are indeed different on the passenger side for a 273 versus a 360.

Before you come on here and discredit a member, and tell him he is wrong, have some proof of what you speak.Here is mine.

First pic: 273/318 right (passenger side mount). Bolts up to the 360 no problem.

Second pic: 340 A-body left (drivers side mount). Bolts up to the 360 no problem.

Third pic: 273/318 left (drivers side mount). We have a problem.

So untill you can show me anything different,your information is incorrect.

Excellent photos JD. That last one is a 318 mount. The one in my photo is an original 1966 A Body 273 mount, and I had my 360 in the Vart with the original 273 mounts for many years - and will again if I ever get the sucker off the rotisserie. :)

Excellent photos JD. That last one is a 318 mount. The one in my photo is an original 1966 A Body 273 mount, and I had my 360 in the Vart with the original 273 mounts for many years - and will again if I ever get the sucker off the rotisserie. :)

Thanks.

We got a little off topic on this thread.
There is actually 2 topic's we are now discussing,early A and later A-body's.
I may have had a part in it.It was not intentional,my bad.

But if we are talking 273/318 mounts vs 340/360 mounts,my info speaks for itself.

Hopefully everybody's info will be able to help in the long run.

JZ

Ya, those last photos of the beautiful orange block with motor mounts are the second generation a-body mounts.

This looks like a good time to ask this even though the topic supposed to be on early A motor mounts I guess.

I have a 67 cuda with a 273. The passenger side motor mount insulator does not fit correctly like it should and even though how hard I try I can't get it to line up properly. The left fits fine.

The picture of Johnny Darts 318 motor mount (the third one) does not look like my mounts at all.

Notice in the picture that the insulator holes are on the same side of both mounts. Aren't they supposed to be opposite?

Has someone installed the wrong mounts on my motor?

Before you come on here and discredit a member, and tell him he is wrong, have some proof of what you speak.Here is mine.

First pic: 273/318 right (passenger side mount). Bolts up to the 360 no problem.

Second pic: 340 A-body left (drivers side mount). Bolts up to the 360 no problem.

Third pic: 273/318 left (drivers side mount). We have a problem.

So untill you can show me anything different,your information is incorrect.

It was not my intention to tell another member they were wrong, I was speaking Klingon: you were speaking Romulan. I was talking early A small block brackets, you are clearly showing 67+ era units. What I am trying to say is that we are both correct for our respective model year applications.:read2:

No harm no foul, and actually my proof was provided indirectly by Neil at the beginning of the thread and later in the post from the Early Valiant/Barracuda site. My slam was towards the Mopar Chassis manual author, as it was the errant descriptor. My apologies to anyone who took my explanation of the modification to the factory early A brackets for use with a 360 as an insult.

The thread got sprinkled with pre and post 67 A-body responses (which you pointed out in a subsequent post). My biggest error was not first asking the question about whether the responder was talking about a set of brackets from a 63-66 K-member versus those for a 67-72 K-member before posting.

Lesson learned.

:toothy10:It was not my intention to tell another member they were wrong, I was speaking Klingon: you were speaking Romulan. I was talking early A small block brackets, you are clearly showing 67+ era units. What I am trying to say is that we are both correct for our respective model year applications.:read2:

No harm no foul, and actually my proof was provided indirectly by Neil at the beginning of the thread and later in the post from the Early Valiant/Barracuda site. My slam was towards the Mopar Chassis manual author, as it was the errant descriptor. My apologies to anyone who took my explanation of the modification to the factory early A brackets for use with a 360 as an insult.

The thread got sprinkled with pre and post 67 A-body responses (which you pointed out in a subsequent post). My biggest error was not first asking the question about whether the responder was talking about a set of brackets from a 63-66 K-member versus those for a 67-72 K-member before posting.

Lesson learned.


Klingon vs Romulan....That is funny.:toothy10:

No apologies necessary....It's all good.:thumrigh:

This looks like a good time to ask this even though the topic supposed to be on early A motor mounts I guess.

I have a 67 cuda with a 273. The passenger side motor mount insulator does not fit correctly like it should and even though how hard I try I can't get it to line up properly. The left fits fine.

The picture of Johnny Darts 318 motor mount (the third one) does not look like my mounts at all.

Notice in the picture that the insulator holes are on the same side of both mounts. Aren't they supposed to be opposite?

Has someone installed the wrong mounts on my motor?

I have the correct right side mount for you if your interested.


Are those the factory mounts?
Whats the history on them?

Through my studies the holes for the insulators should be forward.(Towards the front of the motor).To me it looks like your right mount is wrong.
Look at my pics again and notice the "holes going forward".

You might have a E-body 340 right mount.They sit to the back.(towards the firewall).

Are those the factory mounts?
Whats the history on them?

Through my studies the holes for the insulators should be forward.(Towards the front of the motor).To me it looks like your right mount is wrong.
Look at my pics again and notice the "holes going forward".

You might have a E-body 340 right mount.They sit to the back.(towards the firewall).

I think they are factory mounts. I don't believe they are for my motor and year. They are the ones that was on the car when I bought it.

E-body huh! I wouldn't be amazed because it sure dose not fit right. I didn't have the car long and it ripped the insulator in two on the passenger side.

I think they are factory mounts. I don't believe they are for my motor and year. They are the ones that was on the car when I bought it.

E-body huh! I wouldn't be amazed because it sure dose not fit right. I didn't have the car long and it ripped the insulator in two on the passenger side.

Went out to the garage to find just the mount you need if you are interested.You will see the difference.
Charging the batteries in my camera,will have a pic up shortly.

John

Went out to the garage to find just the mount you need if you are interested.You will see the difference.
Charging the batteries in my camera,will have a pic up shortly.

John

I really appreciate you trying help me out but I've got a real good chance of grabbing a 360 here pretty shortly. But I would still like to see the picture of the motor mount in order to give me a idea of what it should look like.

Marland

Here is the mount you need.
Notice the difference.
If your interested in it let me know.

The 360 will need the same mount.

John

here are my 63-66 a-body v-8 mounts...

http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740488.jpg



passenger side
http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740485.jpg
http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740481.jpg


drivers side.. you can barley see the triangle piece i had to weld on to use it on a 360

http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740478.jpg

Here is the mount you need.
Notice the difference.
If your interested in it let me know.

John


Sure do.

Notice the insulator holes are toward the back. Man I swear I new something was wrong but I could never put my finger on it. I thought it was the one for my motor you know...and I just couldn't ever get that third bolt in it.

I bet the mount you have is thicker far as between the motor and the K-member. Mine measures 1.58 thick.

Just remember,holes go forward.

When I was looking for a A-body 340 left side mount,guys were trying to sell me e-body 340 mounts (Holes to the back on e-bodys).Hopefully this helps.

here are my 63-66 a-body v-8 mounts...

http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740488.jpg



passenger side
http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740485.jpg
http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740481.jpg


drivers side.. you can barley see the triangle piece i had to weld on to use it on a 360

http://pic20.picturetrail.com/VOL1620/1015335/2846390/82740478.jpg

Man those early A-body mounts are thicker and a good bit difference in shape.

Just remember,holes go forward.

When I was looking for a A-body 340 left side mount,guys were trying to sell me e-body 340 mounts (Holes to the back on e-bodys).Hopefully this helps.


OK.

It is definetly the wrong mount.:angry7: