Thread: 305 TBI to 350 intake won't bolt.

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Thanks You guys. Man I'm glad I got on here. You have really cleared this up for me. I think I really have a handle on the situation now. At least I understand it now. I sent the kid to school with a couple of air burr grinders, one straight and one 90. He knows what to do I told him we will need to make washers for it. I like the idea of using round stock and cutting it at an angle. Or I may have some heavy wall tube laying around. Are those 3/8" bolts, grade 8? I think I will need to get him some longer bolts as well.

It is easy and I never said to hog out the holes, I said elongate them to change the angle. A little bit of careful metal removal is all that's needed. When done right, the holes are not wider, just longer.

When using the late intake on early heads, I don't use a wedge washer. I grind the throttle body side of the bolt boss down a little until the bolt and washer fits flat. There is plenty of meat there to work with.

When doing the early intake on a late heads swap, a wedge must be used because you have no boss on the ealy intakes to work with.

Originally Posted by SBMarks3

Ok , I don't like the idea so much now. What about this. Can I put an adaptor plate on the 5.7 4barrel manifold to use the throttle body on it. Or am I just opening up a can of worms. The kid has no money and I'm trying to get him up and running with out costing a fortune. Maybe the elongating the holes is the way to go. I appreciate your opinions Thankyou.

Yes, a place called Turbo City sells them. I used one to put a TBI on an Edelbrock intake and it worked like a champ.

I talked to the kid's shop teacher today, he's on board with the elongation plan. So that good, he can get that thing together and maybe stay out of the deep mud holes.
PS i looked at Turbo city's site but could not find that adaptor.
This site is a great resourse. You guys really have some nice project going and some great talent. Makes me want to tear in to my 50 F3 ford. That and two old Harleys all need attention.
Thanks again for all the help

Originally Posted by SBMarks3

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

Here's a picture from my phone when he stuck it.

Erik Truck swim2.jpg

He sunk it pretty good!!!! Bet it was fun----until the aftermath.

Did he get the intake bolted up?

Originally Posted by camaro_fever68

He sunk it pretty good!!!! Bet it was fun----until the aftermath.

Did he get the intake bolted up?

Yes, Bolted, painted, ready to go. except I'm pretty sure we need to change cams. I asked about that on a different thread.
Yeah He had a blast up until that last puddle.