1940 with maverick rear end

[Theholygrehl]

I just bought a 1977 maverick rear end for my 1940 ford truck. The bolt pattern in 5 on 4 1/2. I'm very new to all this first time doing anything with this type of stuff so bear with me. Can I change it to 5 on 5 1/2? Also it needs new drums where can I get some new ones? Also just picked up a 1987 s10 transmission going to be a big task for me and should be fun I hope. 1946 rebuilt flathead in the truck.