1970 c10 rims LB

[theredmeadow]

Ok so I'm going to be ordering my rims tomorrow for 1970 c10 longbed. Stock height and I plan on keeping it that way. The rims I'm thinking of ordering I just want to verify with you guys that it'll fit and work on my truck. Oh and the truck also has drums on all 4s. So my rims will be 15x8, 3.75 backspacing, 6x5.5 lug pattern.
also, what tire size recommendations?

here's the link
http://www.summitracing.com/parts/usw-94-5860/overview/