305 with 350 heads
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Joined: Nov 2018
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From: Castle rock
Car: 02 avalanche and a 84 camaro
Engine: Putting a 305 in it
Transmission: Automatic sadly
305 with 350 heads
Hey y’all so I’m building a 305 and I’m gonna put 350 heads on it which I know will lower my compression but I’ll get more power at the top end but my question is how do I get the compression to go up again.
Joined: Oct 2001
Posts: 12,232
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 305 with 350 heads
Put C4 vet aluminum heads on it or iron 305 vortec heads.
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Joined: Dec 2006
Posts: 276
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From: Hoffman Estates Il
Car: '88 IROC T5 Vert ‘13 Vette
Engine: 305 TBI
Transmission: T5
Axle/Gears: 3:08
Re: 305 with 350 heads
Waiting in Ft Myers airport 7 hrs to ORD departure.
305 Bore kit LOL Good ol’ Sofa.
“Wouldja just put a L31 350 in it!”
305 Bore kit LOL Good ol’ Sofa.
“Wouldja just put a L31 350 in it!”
Thread Starter
Junior Member
Joined: Nov 2018
Posts: 12
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From: Castle rock
Car: 02 avalanche and a 84 camaro
Engine: Putting a 305 in it
Transmission: Automatic sadly
Re: 305 with 350 heads
Thanks you guys, I am on a very small budget imdont
make very much money I’m just a tow truck driver. I bought the motor for $200 that’s why I’m using the 305 for now. So
What is a cheap way to up my compression with the 350 heads
make very much money I’m just a tow truck driver. I bought the motor for $200 that’s why I’m using the 305 for now. So
What is a cheap way to up my compression with the 350 heads
Joined: Feb 2017
Posts: 4,185
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From: Meriden, CT 06451
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: 305 with 350 heads
If that is the route you are going to take, then use the thinnest head gasket possible.
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Posts: 12
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From: Castle rock
Car: 02 avalanche and a 84 camaro
Engine: Putting a 305 in it
Transmission: Automatic sadly
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Re: 305 with 350 heads
What is a cheap way to up my compression with the 350 heads
Part #s for this include castings ending in 638, 880, etc. There are acoupla more but it's eeeeeeeezie to find em in the buzzard nest. 96 - 2000 trucks are a great source. They're CHEEEEEEEEEEEEEEEEEP. Cheeeeeeeeeeeeeeeper than any of the alternatives I can think of for getting the correct compression under 350 heads.
About the STOOOOOOPIDEST thing you can do, is to "build" a 305. As cheeeeeeeeep as the above-mentioned upgrades are, you have to have a head full of sand to spend money on a 305.
What is YOUR head full of? Sand? Rocks? Sawdust? The proof is in your decision.
You WASTED your $200 if you spent it on a 305. Throw it in the trash, take your lumps, learn your lesson, and move on.
Last edited by sofakingdom; Jan 20, 2019 at 09:51 PM.
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