I know this is not good advise, but I spray 150, and keep my timing set at 15 degrees. No retard.
Aluminum heads help a lot.
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1988 Mustang GT
stock bottom 302, C4
10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN
1989 Mustang notchback
Warmed up 306 with a Procharger.
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