need 8 1/4 advice

yea im not worried about blowing the rear at all. as im most interested in the torque/ 0-60 speed... i will be traveling some 50-65 mph roads every once in a while. so i dont want to go too high. right now im at 65 roughly 1900 (hard to keep the car on the road at 60 right now lol and watch tach). im not sure dimension of tire. id say 27ish inch L-60 bias ply. the car will break loose fairly easily with the gears it has in it now and they are pretty damn low