brake drum compatability???
 

is there such a thing?
I am rebuilding a 98 4runner rear end, for the elocker, but the drums are trash. the backing plate is rusted through and just about everything else is rusted beyond repair. Wondering if the drums from my 90 4runner or my 85 pick up rear end can be swapped over? Or if i should just look into going discs in the back.

Thanks in advance

t t t