70 1 ton axles

[TurnNBurn]

HI all

Im fixing my old workhorse. I have access to two 1 ton axles and I am writing to ask your opinions on them. The first is from a 70 c30, the second is from a 70 chevy motorhome its a small motorhome, has smallblock and th400. My question is did they change the distance on leaf spring pads between 3/4 and 1 tons, for example could I take the 70 1 ton rear and put it in my 79 3/4.
One more thing what rears come in those trucks, the front wheels have the big 5, or 6 bolt pattern i cant really remember, like a truck tho. the rear is a 8 hole.

Ok and how about that motorhome will that be a usable axle or is that a diffrent setup all together.