You will want to use your bellhousing from your 50 model as teh mounts are totally different. As well you will have to drill the front motor plate for teh center type mount used in your 50 model. On the rear of your 50 the rear axle isn't centered with in the wheelwell...so you might as well buy some perches, drill the locating hole forward an inch and quarter/half and weld in the new rear end housing. Even the ealier 55 and up housings you ahve to weld due to being originally mounted under teh spring. If you don't want to mess with that, just replace the center section as earlier stated, but brake parts will be easier to locate locally for teh 62, and more than likely a slightly better design.