
09-04-2012, 07:50 AM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
Brent is right. Modern heads with heart-shaped chambers and quench like 28 to 31. If your original heads are unmodified then the higher numbers are suitable.
BTW-those Weber screens may be a 'rev-limiter'...
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Chas.
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