also remember the more power/torque your motor makes, the higher the stall rating is moved up.. So say you buy the 2500 stall, or so convertor now, for a car with bolt ons'. Now later down the road you ad a blower or nitrous.. Now the stall has moved way up. So rememeber, dont go too high, or you might be sending it back to get tightend up.
Trans-go makes great shift kits.. everyone sells em. try Jegs, or Summit.
Precision Industries makes the Stallion, which is one of the best for our cars.