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Old 04-18-2004, 05:07 PM
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Proper Gasket thickness available

Thanks for all that responed to my earlier post.

What is the max thickness I can use for the head gaskets on a sbc 350 with 305 (62cc) heads.

I checked a couple of websites and it states with the ratio of 11 to 1 (which is what this engine will produce) [62cc heads; flat top pistons; 0 deck height and .041 gaskets) ] I require an Octane of about 121 (..... damn). Is this correct????

My second question is what I should expect once I remove my existing stock heads from my 350 for deck height. I have been told with flat top pistons the deck height will be .035 approx. Is this correct or will I just have to pull the heads and measure to be sure.

I am trying to get a compression ratio of approx 9.8 to 1 for a street truck. I seem to remember some articles discussing the use of a cam to reduce the compression ration (or more precisely- to remove detonation)

Thanks again for your help.
Hopefully I did not waste my money on these heads (305 140014416) I paid 450 for them (rebuild with 2.02/1.6 valve)


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Old 04-18-2004, 07:16 PM
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Don't decrease your compression by using a thick head gasket. It kills your quench (by making it far too large) and your car will run like dog *****.

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