I have to agree with Unit 5302. I ran 106 mph with 3.73 and 101 with 3.08 on street tires also .9 sec faster.
They were different cars, similar weight and the same drive train,
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82 Mercury Capri 302.
Comp. Cams
Tremec 3550
3.73's
12.8@106 N/A
Kevin's Capri