hi
i am going to be fitting later brakes to mine soon so been looking at this.
to fit the larger caliper on a early 80 you need the larger discs aswell but seems to be just the 2 items that are different. pads are the same so should be able to do the 100 series pad mod aswell. for what its worth the pads are tge same on a 95 as well. forgot to say you need 16" wheels if you do the back. some 15 will fit depending on the offset. i dont know the specs for this
if you need more info search iha8mud good write up about it.
stu