I'm fond of the lifter-bore holder for a dial indicator when degreeing the camshaft. Obviously, a degree wheel is required, also. There are other sorts of dial indicator holders, but this is simple and easy.
https://www.summitracing.com/parts/cca-4925
Tapered ring compressors are wonderful...and expensive. This is what I use. Beware--there's imported-junk knockoffs of the genuine Lisle tool, and in a cruel twist of fate, they cost as much as the genuine item. The last time I inspected the knockoff, they'd punched the metal strap from the wrong direction--leaving jagged edges which would destroy the moly face of the rings as you slide the piston into the cylinder. This is more-or-less infinitely adjustable, and with care holds the adjustment from first piston to the last piston of each build. Cheap and effective.
https://www.summitracing.com/parts/lil-21700