I put the 2.75 low gear ( 10 % lower than stock 2.48 ) set into my 67 Catalina with a T-400 and 2.56 rear posi. 9.5 compression 462, mild cam ,stock converter. Gets off the line quick and runs on highway nice. Ten percent lower on a 3.08 will feel like 3.42's in low gear, and still cruise the highway with the 3.08.
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