I use a "rivet remover tool
" (don't think I paid THAT much for mine!) A center punch works well too. You can buy a complete buck rivet installation kit
from Vintage Trailer Supply.
I have most of this stuff and the rest I borrowed from an uncle that works on antique aircraft.
I would NOT want to use olympic rivets where structural integrity is paramount, but I am anal that way.
I am in the process of overhauling the rear end on my 1975, I am replacing a lot of the metal back there and doubling up on rivets in a couple of places.