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Anyone ever try GM Alum heads

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Old 03-25-2006, 08:03 PM
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Default Anyone ever try GM Alum heads

I was thinking maybe a set of casting #12363390
I know a guy who runs the parts department at a chevy dealer. I can buy these heads at cost. I was just wondering if they are worth using on a boat.
They are the heads that come on the crate 502/502
Oval port 110cc combustion chamber 2.25 and 1.88 stainless valves (NOT INCONNEL).
Are they any good?

THEY HAVE TO BE BETTER THEN THE PEANUT PORTS they would replace

Last edited by wtpowered; 03-25-2006 at 08:31 PM.
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Old 03-25-2006, 10:51 PM
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Default Re: Anyone ever try GM Alum heads

Originally Posted by wtpowered
I was thinking maybe a set of casting #12363390
I know a guy who runs the parts department at a chevy dealer. I can buy these heads at cost. I was just wondering if they are worth using on a boat.
They are the heads that come on the crate 502/502
Oval port 110cc combustion chamber 2.25 and 1.88 stainless valves (NOT INCONNEL).
Are they any good?

THEY HAVE TO BE BETTER THEN THE PEANUT PORTS they would replace
I am using those exact heads, with some extensive mods. First off, what has your bud told you is his cost on each head? I am to assume that these are complete heads with the valve train installed? Remember, those heads do NOT come with the nice roller rockers. Just the steel stamp ones.
So the first (and a must) mod you must make is adding the roller rockers to the tune of about 325.00 bucks.

Last edited by ROTAX454; 03-25-2006 at 10:54 PM.
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Old 03-26-2006, 01:35 PM
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Default Re: Anyone ever try GM Alum heads

Search the forum for "ZZ502" and that should bring up some good threads on the subject..
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