[70Chevy4x4Nut]

I'm working on a 70 4x4 1/2 ton pickup. I currently have 3.07 gears, open diffs. I know where there is a 77 3/4 ton chevy to buy parts off of. Does anyone know if these axles will bolt right up to my truck? I am assuming that the 77 has pretty low gears and maybe limited slip at least. I will have to convert to 8 lug, but thats ok. Just need to know if there are any other mods to make besides the driveshaft. Will all my old leaf springs, ubolts ect fit?

Thanks