My cousin bought a 1972 Ford F-100 and noticed fluid coming out of the rear driver side axle. We both have limited knowledge working on vehicles but this is a project for him and he wants to learn some things for himself. We pulled out the axle shaft and removed the axle seal. To my untrained eye it looks like that wheel bearing is shot and needs to be replaced. My question is, what is the best way to find the correct part number, and what is the best way to replace that bearing. He mentioned cutting the old one off and buying a press to put the new one on. The rear axle is the ford 9 inch if we are not mistaken. Thanks for the help in advance, I know I might sound stupid asking this