the problem is...your '91 doesn't have 10" drums, if I remember correctly.
...being a '91 dana 35, it is a c-clip axle. since it is a c-clip axle, it wouldn't be 10" drums. since it's not 10" drums, it's strictly incompatible with your dana 44 and you will need to buy new brake kits for your dana 44.
and to go further into this...I've tried to put 9" d35 c-clip brakes on a non-c clip dana 35. can't.
if you want to spend time making stuff work, run to a junkyard and get a set of ZJ rear disc brakes from a dana 35, then put those on.