72 GMC 4x4 4speed Suburban big block

[GKoepp]

Having issues putting big block in and clearing linkage any suggestions on manifolds or headers that work :gmc2

[olblue60@aol.com]

Have you started by installing big block motor mounts? If so you should be able to change to any factory truck big block only parts.

John

[GKoepp]

Big block mounts were not offered in 4x4 67 to 72 models

[olblue60@aol.com]

Sorry for confusing your thread. I KNEW THAT! My brain must have skipped a beat.

[GKoepp]

Here's my problem would like to install headers for my 454 to clear frame but they wont clear my linkage for clutch have you or anyone on here had this issue and how do I over come it without going automatic there not much room with the 4x4 transfercase on a 4 speed

[Dieselwrencher]

I put a 396 in my 70 3/4 ton 4x4 and I ended up using headers for 73 up 2wd trucks with BBC's in them. You might have good luck with a chevelle header too.

[scotto0609]

I believe hooker makes a app for it,its been years but had a 69 with a bb 4 spd set up.they were expensive but fit real nice.

[bntmotorcycles]

I did this same set up on a 71 4x4 3/4 PU. I used stock manifolds. The trick is the bracket for the Z bar. Chevy had a special bracket that mounted to the engine. Look it up in the old parts manuels. I found one off a big block 4spd 2wd and it worked fine. Caution though. This part is hard to find and unless you see one on a truck it won't make since to ya. It's weird but it works.