You might find that the 62 inches is too narrow for more modern rims 'cause the backspacing is different. That's what happened to me. I had a nice 10 bolt posi from a retired police caprice classic- 62" turned out I needed 64 or 65 'cause the newer rims mount further towards the outside than the original ones- I guess I could have used a 1" spacer and longer bolts but found a nice 12 bolt-

Hope your disc brakes work out!

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi