We have 96 heads in a 71 T37. The 96 heads often start out close to 98 cc, and some get toward 100cc after a valve job. The compression can be in the lower 9s with some 455s and 96 heads, with that cam and the fuel octane it currently likes, my guess is it may be a little lower on compression than mid 9s. Likely it is several things adding up to not meet expectations.
Last edited by Jay S; 01-18-2024 at 01:57 PM.
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