I've used the air pressure method on a 5MGE. I cut down an old spark plug and silver soldered an extension onto it and plugged it into a 100psi air supply. Works well. Used a socket and knuckle bar connected to the crank and tied this off with some rope so the crank wouldn't turn. Easy peasy.
The 1UZ is a pain because the valve springs are recessed deeply into the heads, and normal OHC valve compressors don't work. Getting the collets off is the pain.