Many thanks to all who answered. I think I'll try Rick's approach. I'm planning on going to 3.73 or 3.91 gears. Summit Racing has steelies and Ralleys in 15" SBP, if I can use those and put some discs on the rear, I'll be happy. FYI, the motor will be a 408" Trick Flow heads and intake, a Racer Brown cam around .685@256, and 10.5 to 1. The carb I have is a QF 750 mechanical secondary. TTI step headers, and MSD E-Curve distributor. A Pat Blaise 727is done, and I'm told a big 3500-4000 converter will work for street and light strip duty.