Whoops, just realized I said 60-series "booster" and not "master." In either case - no, in order to run the 60 series master, I didn't even have to trim down the push-rod in the brake booster like folks often do in order to run an 80-series master. I just adjusted it to ALMOST its shortest setting, but it cleared and I got the little gap required between booster and master without trimming. The 80-series master apparently pushes more fluid though.
My only complaints are that 1. It was not stocked anywhere, so I had to wait a while to get it and 2. That very master pictured above is now leaking from the bottom of that rubber hose to the front reservoir. It's very slow, so I haven't messed with it or tried to fix it, but disheartening after all the work I did this summer! In short: just make sure you buy a quality rebuild. Mine was from NAPA and I'm not super impressed.