am i able to take the drum brake parts off of my 72 charger 10" rear end and put them on a 8 3/4 rear end

???????
Ten inch rear end?
You are new here so you get a little help! Maybe you meant 10 inch drum brakes? I'll tell you what I know for sure: If you have an 8 1/4 axle in there now and want to upgrade to an 8 3/4, then YES, the brakes from the 8 1/4 axle will fit. The 8 1/4 axle only used 4 bolts on the backing plates while the 8 3/4 used all 5. The plates are punched with 5 holes to fit both axles.

Many mopar rear brakes off 8 1/4 axles, 8 3/4 axles and 9 1/4 axles will swap. It seems like some of the newer (late 70's+) 7 1/4 axles may also swap. (The A body 7 1/4's won't fit)

The earlier 8 3/4 axles used brakes with a different drum design than the later 8 3/4's. These had a center bolt holding the drum on the axle. I don't believe the later brakes will swap onto these axles easily.

If we knew what year and model car the 8 3/4 axle is from, some better advice could be given on the swap.