he's only pulling valvecovers
tdc with the airhose is a good idea esp if your compressor sucks. lever type or screw type compressors are fine, one slower than the other but has less "oops" potential
at most he needs coolant elbows
use a ~5/8ths inch magnetic spark plug socket on the retainers to tap em with a hammer to get em off real quick if your a real badass...in all seriousness, just tapping em a bit can loosen the retainer to keeper "wedge" and make removal alot easier. oe springs aint bad but big springs can really lock them fuckers in place where even my badboy off car compressor has a hard time breaking em loose
if yer running high ratio rockers you may want to get the modified lsx retainers, new seals is a good ideastick with oem type as the hammer on vitons can be a bit much for some hillbilly's.
make sure when you tighten down the rockers you make sure they are on base circle and not open, you go tightening em down and the lifter is on the nose and not bled down you can shove the retainer into the seal and damage it, not to mention shoving the valve into the piston if its at tdc
outboard 2 rockers get tightened first, help hold the nose to avoid fastener tq from twisitng you off the center of the valve.