Solid or hyd flat tappet cam? 1.5 ratio rockers?
Rear gear and tires? Upgraded your driveshaft?
72 cc chamber heads? Should net around 11.8 to 1. 85cc would be around 10.4 to 1 with a 0 deck.
Stock water pump, power steering, AC?
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68 Firebird
Are you running with the wind or breaking it?
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