Driveshaft question:

Bill another argument for replacing the axles instead of drilling out your original axles and putting in 1/2" studs is there's just barely enough room for another set of bolt holes on the axle flange. My car had stock axles that were re-drilled when I bought it and the new LBP studs are extremely close to the holes where the original studs were. You could probably pay a machine shop to weld up the old holes and machine the surface flat again and drill new holes but that'd probably cost 3/4 as much as a stronger set of aftermarket axles.