There are several advantages with using an early 360 block in place of a 340. The main webs in the early 360 are extra beefy, and the lifter bores aren’t countersunk. And the cylinder walls are thick to the point of being nearly Siamesed.
Homemade 340 ###
- Thread starter SS Lancer
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SS Lancer
Well-Known Member
Simply because I wanted to !
SS Lancer
Well-Known Member
Everyone is on a different path
There’s enough material in the webs to four bolt main these blocks I think it would best be done with 7/16 splayed side bolts on the center three caps using a 318/340 sized cap line bored onto the block with a set of upper spacers if it were planned to use the block to its full potential.
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Bakerlite
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Yep, it's fun just to build odd stuff and make things work..
True! Build something slightly off and people start instantly with “Why didn’t you……”
I don’t get it. It’s pretty obvious he wanted a 340 so he went this route.
I don’t get it. It’s pretty obvious he wanted a 340 so he went this route.
That’s it right there! And the block he used is also nearly as strong as a T/A block. It’s good to see this one go from what it was dismantled from to what it is now. It was a 1973 W300, Windsor plant engine that was used on a mine as a powder truck. And like he says, it saves the 340 for the restoration crowd.
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SS Lancer
Well-Known Member
SS Lancer
Well-Known Member
This was a BEEFY BLOCK and thanks for selling it to me ###
SS Lancer
Well-Known Member
I built a strong LA using parts I have horted up ### and because I could .
harrisonm
Well-Known Member
So that yields a 340 displacement?
So what static compression are you shootin for? Don't forget, We still have this lock thing for you ridin around in Kitty's car. lol
Dan the man
Well-Known Member
What holds the spacers in the block as I don't see any tabs on them. I like the idea of destroking a 360 to get a 340. It's sad that the aftermarket doesn't offer a 360 crank with a 340 stroke, when it comes to the mopar the aftermarket is lacking. How long was it before you could get a 440 crank with 400 main bearing journal size? If there was a 3.480" stroker crankshaft, you could bore a 318 0.030", use factory rods and off the shelf replacement pistons ( I think the compression height is 1.725" ) and you'd have a 340. I'm not sure about the compression height of the pistons I do remember looking them up, I believe that they are speed pros.
I think for most whats attractive about the 340 isn't the total cubic inches but the bore to stroke ratio and the reputation for performance associated with the original 340. It's like having a 302 chevy vs a 305 chevy. similar in cubic inch but different reputations.
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Rat Bastid
Dunamis Metron
There has never been a production block anywhere near as strong as an X block, let alone the R series blocks. Not even close.
Not even the T/A block was close to the X block. And I’ve seen a couple of the thick 360 blocks. Not one of them had pan rails any thicker than any other block.
Okay, thanks! I actually meant nearly as strong as a T/A block, an X block is a whole ‘nother world away. Duly noted and corrected!
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SS Lancer
Well-Known Member
Yes Sir - your slant will be pulled soon and we will meet up in Macon
SS Lancer
Well-Known Member
Spacers are machined with a bit of [CRUSH] built in so when main-caps are torqued they are clamped tightly just like the bearing shells.
SS Lancer
Well-Known Member
Assembly getting started ####
Wasn't trying to rush on that. We can meet before that if you need it. No problem at all.
One of my old machinists called it the perfect small block. Said he loved them. That bore to stroke ratio he loved in addition to the long rod is what he and I really like about it. It’s also what I like about the B series engines as well.
Reminds me of a time when I was fooling around with a father and son in there Monte Carlo SS while I was in my Magnum. When we got to the next light we had a quick chat where I down played everything but told the truth.when I asked him what he was sporting under the hood, they said it was a 383. Not very impressive and even more so since I had not a lot of modifications to my mill but there’s was a huge list of garbage done.
They were all smiles until I lifted the hood where they seen what is basically a pile of greasy crap and very old aluminum. I think they left upset. Not to sure but there smiles were gone. Nice car though. I was just surprise on how slow it was for the list of parts they pounded there chest on.
Think before you build only cams to mind.
Build it right the first time fellas!
Reminds me of a time when I was fooling around with a father and son in there Monte Carlo SS while I was in my Magnum. When we got to the next light we had a quick chat where I down played everything but told the truth.when I asked him what he was sporting under the hood, they said it was a 383. Not very impressive and even more so since I had not a lot of modifications to my mill but there’s was a huge list of garbage done.
They were all smiles until I lifted the hood where they seen what is basically a pile of greasy crap and very old aluminum. I think they left upset. Not to sure but there smiles were gone. Nice car though. I was just surprise on how slow it was for the list of parts they pounded there chest on.
Think before you build only cams to mind.
Build it right the first time fellas!
Just imagine with nothing else changed had they stuck with the 68 4 speed cam for all of them and put W2 heads and intake on them. What could have kept up with an A body with that in it? It'd have to have been really substantial.
DieWilde13
Well-Known Member
That is very interesting! Booked....
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