I have a 72 Camaro with 402. 10.5:1 Speed pro pistons, ported stock heads for now, RPM air gap intake and Holley HP 830 carb.Electric fan.1 7/8" hedman headers to 2.5" duals w/H pipe and 40 series Flowmasters. I havea t56 6 speed with Centerforce Dual Friction clutch. Rear is Ford 9" w/ 4.30 gears and mini spool. Car has been lowered 1 1/2" and all bushings in car are now poly. I have a pair of M/T Indy Profile S/S L60-15 tires for racing for now. What do you estimate my 1/4 mile time to be?

 

you will run around a 12.30, maybe 12.15 if you get a good jump an can shift

 

btw that is an aweful lot of gear for that transmission

 

That's what came with the car when I bought it 11 years ago. Besides, I heard that 6th gear was almost useless in the late Z28's inless you were at 80 or more. Maybe it'll help with fuel mileage Ha! I guess my first gear will be short. BTW, Ignore the other post in this forum. I screwed up and submitted twice.

 

Low 12s if you can grab 3rdgear lol.