Dana 60 S60 or Ford 9"

the gear ratio I will probably be running will be a 4.88 or a 4.56. the back half will be practically a pro stock back half with the stock style front suspension. the car will be running around the 8.50s in the 1/4, 5.40s in the 1/8th.
I am surprised at your gear ratio plan for the expected et.
Most cars that I see with that kind of power and et using a pro stock size tire are using a 4:10 and numerically lower. These car make so much torque, that gearing them up never lets the slicks hookup.