Well all I want to do is get all I can out of it in the 1/8 mile being that is all I'm gonna run. now 6.20 is great but out of all the calculaters I've been checking on it says that I should be doing 6.20 with 580 flywheel HP with my weight and present gears and mine dynoed 667 at the flywheel with 575 ft# tq. [434 ci] I'm not being greedy I just want it to do the best it can do and if 6.20 is the best it can do then I will be Happy with that. But if a gear change can take me down to 6.00 or 5.90 then I need a gear change.
Thank you Doorracer for your reply. and your help.
Andy