77 gmc k25 sbc to bbc swap questions.

[ruedger455]

I have a 77 gmc k25 sierra grande with a 350. I wanted to know if i swap it for a big block, will it hit the ac housing and the brake booster? Or will i be able to just swap it with no clearance issues? I really want the lowend grunt of a big block but dont wanna mess with the booster and a/c delete. If its an issue ill just go with a 383 stroker or something like that. But really want a big block lol

 

[MadOgre]

I have a 77 gmc k25 sierra grande with a 350. I wanted to know if i swap it for a big block, will it hit the ac housing and the brake booster? Or will i be able to just swap it with no clearance issues? I really want the lowend grunt of a big block but dont wanna mess with the booster and a/c delete. If its an issue ill just go with a 383 stroker or something like that. But really want a big block lol

I know that it will not hit the A/C housing. As for the brake booster Im not sure. I have hydro boost. I do believe there are 2 different sized boosters though. So you may be able to get a smaller booster if necessary. Not sure about that though!

 

[ruedger455]

Ok thats what i was thinking. Thanks for replying so quickly, i appreciate it. If anyone else has more experience with the matter at hand lol id appreciate any advice.

 

[bucket]

It goes right in and you can even use the small block engine mounts.

 

[ruedger455]

Awesome!!! Thank you bucket i appreciate it. Im thinking about dropping a 396 in.