CopMagnetLS1, you shouldn't have any problems with a C-4, 3.73 gears and a 28in tall slick. Of course a lot depends on your converter too. If it has too much stall or a lot of slippage up top, you will have issues. You also have to take into account the RPM range you will be running in as well. No sense spinning the engine to 6500 if it only makes power to 5000.
Scott, where did your car make it's peak power on the dyno? What were you shifting at?