Author Topic: 350 Compression Ok Rebuild  (Read 280 times)

Offline caleb22

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350 Compression Ok Rebuild
« on: July 11, 2018, 11:35:37 AM »
My 76 has a 350 with a crate block mated to a TH350, purchased in 2004 by the previous owner. I think the 290HP model as I can't get my over-sized skull in there to get the cast number off of it. It drives OK now but want to refresh it. Also periodic vapor lock issue but I bought a phenolic spacer and new fuel lines to see how that helps and will re-route the lines.

In any event, I did a compression test and all 8 came back in the 145+ range so that seemed OK?

I would like to yank it out and replace the cam, heads, intake, and carb (possibly, have a 1406 now). Goal is more HP but also more torque for my 35's. This will be a DD without any off-road, factory axles on it now.

Any recommendations for cam, heads, and intake? EFI isn't out of the question just have to decide if I want to run a return line back to the tank.

Goals are more HP, torque, and experience :)

Offline Rapid Roy

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Re: 350 Compression Ok Rebuild
« Reply #1 on: July 11, 2018, 01:36:46 PM »
Welcome to the site.
1974 Cheyenne 10 LWB 350/TH350/AC/4 BBL Quadrajet

Online VileZambonie

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Re: 350 Compression Ok Rebuild
« Reply #2 on: July 11, 2018, 05:55:00 PM »
Unless you are having issues with the engine, I would recommend starting with gear ratio selection and adding overdrive.
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Offline Irish_Alley

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Re: 350 Compression Ok Rebuild
« Reply #3 on: July 20, 2018, 11:47:09 PM »
Unless you are having issues with the engine, I would recommend starting with gear ratio selection and adding overdrive.

ill go with this also, 4.10 ratio (easily found in ¾ tons) and a mild built 700r4. then if you want more engine power youre setup for it. if you want crazy power get the 700r4 built for it
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Online chevyman85

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Re: 350 Compression Ok Rebuild
« Reply #4 on: July 26, 2018, 07:29:26 PM »
With stock converter, and dish pistons

Cam: Probably no bigger than a Voodoo 256, Comp XE262, Comp 268HE, Elgin 1065 cam, Crane 272 Energizer

Heads: Vortec, World Product torquer 170cc 042660, Flotek, Assault, NGK. Any head 185cc or less would do, for the 290hp crate engine
Intake: Edelbrock Performer.

A healthy stock quadrajet is hard to beat, on a stock or q-jet edelbrock intake.