nipples

[DCON]

now that i have your attention!
just sent 15 lbs. of goodies out to be plated (cad) and i noticed the guage difference in the front and rear spokes. my question is... are the nipples the same size front and rear. they seem to be but i thought i would ask to be on the safe side.
couple more questions if you guys dont mind, are there any cast zinc parts on this bike? (65 cb77)
and are those pyramid brand fork seals ok? i thought that there were two different sizes for the steel/alloy lowers and i am about ready to get into them. can anyone recommend a good vendor if not? 4 plus years into this bike and finally starting to come together. when i bought her i probably could have(should have?) timed and tuned her and had a nice runner. but noooo, every nut and bolt i said. 4 years ago...