Mr. Lee, I think built automatics are only faster in really quick, powerful cars. An auto tranny has to turn an oil pump to produce line pressure that makes the thing work. I use a C-4 with a B&M shift kit and a TCI 2500 stall torque converter. This works well for me and is very consistent. The C-4 does cast me probably 20-25 h.p. though. That's OK, I like it anyway. 4 and 5 speeds with the same set up would be faster, but only with a good driver.
Rev
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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.
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