What parts are interchangeable

[B111Y]

Hello!
I have a 1984 GMC Sierra Classic 1500 with a weak and smokey 305 and was thinking about buying a 350 long block to replace it with. Then I started wondering if all the accessories intake manifold etc... would swap over to the 350. Any help would be appreciated.

 

[84 M1008]

Yup, pretty much everything .

 

[B111Y]

I wasn't sure if there was a difference in the intake mamifolds or not. I guess the only real differences are the bore and crank

 

[73c20jim]

depends on which 350 you get.

 

[84 M1008]

All 1st and 2nd generation small block engine parts such as heads, exhaust manifolds, water pumps and accessories are interchangeable. Personally, I would buy a complete drop in runner oil pan to carb engine. They aren't really that much more money. At the end of the day, you'll spend the difference completing the long block.