need help engine doesnt fit

[mrgoodwrench_420]

i have a 68 gmc pu 1500 and it came with a 250 and a 3 spd i am putting a 350 and a 5 speed in it i used the bellhousing from the 3 speed and put it on the 5speed so i could use the mounting bolts on the bellhousing and when i try to put my350 in the valve covers hit the fire wall it is almost like the trans sits back to far also i am using mouor mounts and brackets from a 80 gmc and was going to see where the engine sat and drill out the holes but trans is sitting back to far what do i need

[truckdude239]

you need the mounts out of a 67-72 v-8 truck

[shifty]

You need to use the mounting holes that are farther forward than the ones you're using now. I can't tell you if you need BB or SB mounts (if there's a diff'ce...I swapped to LS1).

I don't know if the crossmember from a 80 GMC is the same as the '68 so I dunno if you're going to have problems when it comes to bolting it up. I would get towers and mounts particular to your application.

[gentry69]

truck dude is right the 6 cylinder and 8 cylinder mounts are different and i think u have to move them forward the holes are already there so they will bolt right in

[53burb]

There are alot of people who mount the SBC in the 250 (I6) position. You have to use use 67-72 chevy truck mounts. From what I understand, it is easily done w/o any extra holes being drilled, it just moves the engine fairly close to the firewall. Really close if you are using an HEI distributor, but still easily done. Not sure if you need the I6 or SBC stands...

[Palf70Step]

To mount it in the 6 position, you use 6 cylinder stands. The eights won't line up. It should work, but be very close. Depending on the type valve covers you have (real tall), that may be some of the cause. I am not sure if you can use the stock bell housing mounts. I'm told those are different between 6 and 8s.

[rkarr]

Call ECE. I just sent a bunch of crossmembers down to them... One of them was for a 350 bell-housing mount... Talk to Terry.