whats a side cap?
if you are talking plastic side covers - no, mounts are different.
If you are talking engine covers then they all should be pretty much the same anyway.
K7s have their own 4 into 4 design, what's wrong with those?
I don't understand this need to make the later K's look like the earlier ones. If you wanted an earlier K (69-76) why not just buy an earlier K bike? For the most part, about the only cosmetic things that will swap over from the earlier K bikes are the tank but it won't fit your seat. (the side covers, seat, etc are all different on the K7-K8 from the K0-K6 and won't fit wothout mods).