Hi Guys, I'm new to this forum, My son has a problem. He has a stock 87 chevy 4x4 with a 305 TBI. He was mudding and ran it into a deep water mud pit, it died. he tried to crank it in the pit, water came pumping up through the throttle body. He didn't know better. we yanked him out and towed the truck to his High school auto shop. He drained it changed the oil and fired it up but it knocks real bad and backfires up through the TBI. and of course everything is full of water.

Now he also has a engine trans and transfer case from an 86 k5 blazer the engine is a 350 4bolt targetmaster engine. he has both engines as school now. the plan was to put a mild rv cam in the 350, and put the TBI and manifold on the 350. Throw all the blazer stuff back into the pu truck and live happly ever after. got the cam in and today went to put the tbi and manifold on the 350 and he said the bolt holes don't line up.

We want to run the TBI on the 350. Why won't it bolt up. any advice would be appreciated.
Thanks