I will make this simple, get your self a Schumacher 440 swap kit, plus ask them about shims for the motor to help get the motor level once its in. Follow there directions on what needs little modifications. You may have trouble with water pump to radiator clearance or use an electric water pump and fans. Torsion bars are up to you, if you want to drive just on the street and some drag racing. I would upgrade. Now I would upgrade to disc up front. That's up to you. Drums may be a little hard to stop with. Schumacher headers fit great and do work with a 500HP motor.