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-   -   305 with 350 heads (https://www.thirdgen.org/forums/engine-swap/758548-305-350-heads.html)

jdawgcrouser 01-18-2019 11:38 AM

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.

TTOP350 01-18-2019 01:12 PM

Re: 305 with 350 heads
 
Put C4 vet aluminum heads on it or iron 305 vortec heads.

sofakingdom 01-18-2019 07:55 PM

Re: 305 with 350 heads
 
Best way is, get a "bore kit" for that 305 block.

Mortorq 01-19-2019 07:28 PM

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!”

jdawgcrouser 01-20-2019 07:59 PM

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

NoEmissions84TA 01-20-2019 08:58 PM

Re: 305 with 350 heads
 
If that is the route you are going to take, then use the thinnest head gasket possible.

jdawgcrouser 01-20-2019 09:04 PM

Re: 305 with 350 heads
 

Originally Posted by NoEmissions84TA (Post 6275857)
If that is the route you are going to take, then use the thinnest head gasket possible.

awesome thank you man

sofakingdom 01-20-2019 09:43 PM

Re: 305 with 350 heads
 

What is a cheap way to up my compression with the 350 heads
A "bore kit" for your 305.

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.


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