Are we both talking about the same thing? Or head studs versus head bolts. Bolts of course come right out when you take the head off and are out of the way. LowToYa253 is talking about studs, unless they are broached and you use an Allen head wrench to remove them requiring the head to slide up and off of the studs. Which means you need to have enough room to do that. I don't know exactly how much room is between the head and the firewall so I just wanted mention to LowToya253 to look at the top of the studs to see if their are newer studs with the Allen hole broached in it. In case he needs to remove them if the head does not have enough room to slide over them during a head removal. Head bolts of course will be removed and the head can just slide up and out. It sounds like he may be assembling the engine out of the car, and if the studs are not broached, it could be difficult later, especially if your are using a sealer or a locktight. If the studs again are not broached and he intends to assemble the heads on the short block in the car, it may also be a problem. Just an FYI.