I have a 10 bolt chev rear out of a 1973 full size chevy wagon. Am considering narrowing it down and using in my 55 chev project. Sometime back I tried to narrow a 10 bolt from a Nova and found it had tapered splines making it difficult to narrow and went to a ford 9" instead. Does anyone know if this one would likely have tapered axle splines or not and also would this be much stronger than the stock 55 rear. Going with a slightly beefed 350 and 4 speed in the car.