Small or big block, I like to keep the end studs. Even in blind head bolt holes.
Schumacher's are easy over full length because of weight.Hang 'um on the studs makes 'um easier to start the center bolts. My 2 cents.
Studs if they don't get in the way of installation. Bolts, maybe, till installed, then you can replace the bolts with a stud and sealer, one at a time.
With alum heads, try to use studs so that all of the threads are engaged in the soft alum; no stripped threads. Studs can be fitted after the headers are put in place to make install easier. Cut the studs to the desired length. Cut/grind a screwdriver slot in one end. Screw the stud in with a s/driver. Use anti-seize.
Using make-shift methods to remove and install studs is often ineffective and has a higher possibility to causing damage to the studs, meaning more work. This set is specifically designed to make it easier to do it the right way every time. Each version(SAE and metric) includes five installers...