First post, hi everyone. I have a 66 Elcamino and would like to do a little drag racing with my soon to be 16 year old son. It has a 350 ZZ4 crate motor, 355 hp, with M21 muncie, and 15" tires. Does anyone know how to calculate what gears I should go with to not be reving 8000 at the end. It has 308 now, was thinking 411's. Would apprieciate any help. Thanx Al