Have you eve tried finding out what your car likes for shift RPM at the races ? If not you should, try 5000 RPM in 1st and 2nd, then 55000 RPM in both and then 6000 RPM in both. If it goes faster in the 330 and 660 times shifting it higher then try 6500 and up until it starts to slows down twocents scope

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)