Dana 35s came with two different brake sizes. Up through 89 or 90, they got the 10 inch diameter drums with skinnier pads, then they went to the 9 inch diameter drums with wider pads. The 9 inch drums, and all brake components are the same as the 9 inch brakes on the 8.25.
The backing plates are even the same, except the 8.25 ones have a slightly larger center hole.
The 10 inch stuff cannot be put on a 9 inch D35 or 8.25.