BAE "hemi" head studs require the use of torque adapters. I have a snapon one specifically for that 5/8" fastener, all my other torque adapters are Capri. Comes in handy with GM 01-10 2500 upper control arms.
Lithium or anything PTFE based is what I’d use for the slides.
Congrats on the killer box at a killer price. Cant wait to see what it looks like finished up!