i am putting a full-floater 14-bolt rear end in and am looking to change the drum to disc. a couple people have told me that all i need are calipers, rotors, brake pads, and the template, but i am wondering about the hub situation. i have a drum that i believe to contain the hub inside of it? it has a seal, and two bearings - are the seal and the two bearings the hub? if so, what do i need in addition to previous list to complete this transformation?any information i am most gracious for.