K-member and mount ??

[Duster_71]

Hello all,

I have a 74 Duster /6 car that was already converted to V8 (318) via motor mount kit w/727 and 8.75 rear. The motor currently seems to sit a little high. Anyway, this winter I'm replacing the 318 with a fresh 340 and wondered if it would be worth swapping the k-member for a V8 member or just go with the motor mount kit that I have. Do I have anything to gain by replacing the K-member? Also, is the height thing just in my head or could there be something to that too? I ask about the height because I planned to use an Edelbrock airgap intake and I think it will add a little more height to the carb.

 

[zigs]

the only difference I believe is the mount measurements , k-member is the same. there are tutorials on here about k - members . do a search you'll find plenty of talk.

 

[Duster_71]

Hello all,
Do I have this posted in the wrong area? I was hoping that some folks that have used the mount kits to complete their swaps could chime in about the height of their engines.

 

[zigs]

you should be good with what you have. what mount kit do you have? your engine should set normally . Go to the small block forum I'm sure you will have luck there.

 

[moparmat2000]

Drivers side mount ears cast into the block are different from 318 to 340-360. You will have to shim the drivers side mount with an approximate 1/2" thick spacer on the back motor mount ear to mount these mounts on a 340-360 if using your existing drivers side 318 motor mount. You eill also need to get a longer bolt to go along with the spacer. Get a grade 8 as thats what the rest of the mount bolts are, or should be. Passenger side block mounting ears are in the same location and spacing for 273, 318, 340, 360. I can send you pix with a tape measure, but you have a 318 and a 340. Just measure the spacing between the fwd and aft mount ears on both blocks. The 340 block they are closer together by approx 1/2" compared to the 318.

Hope this helps
Matt

 

[zigs]

Drivers side mount ears cast into the block are different from 318 to 340-360. You will have to shim the drivers side mount with an approximate 1/2" thick spacer on the back motor mount ear to mount these mounts on a 340-360 if using your existing drivers side 318 motor mount. You eill also need to get a longer bolt to go along with the spacer. Get a grade 8 as thats what the rest of the mount bolts are, or should be. Passenger side block mounting ears are in the same location and spacing for 273, 318, 340, 360. I can send you pix with a tape measure, but you have a 318 and a 340. Just measure the spacing between the fwd and aft mount ears on both blocks. The 340 block they are closer together by approx 1/2" compared to the 318.

Hope this helps
Matt

Thank you

 

[moparmat2000]

Your welcome.