One thing to remember. You have to have a few drifts made ahead of time before getting started on any head that has a pierced eye. Watch some videos and you'll also see that you, at least, need a striker if not a power hammer. I work alone most of the time, but I have a Power hammer. Wyatt helps me some too.
The drifts need to be fairly smooth so they wont hang up and rounded on the corners so cold shuts wont get started which are unsightly and cause the head to crack in the quench if you dont watch it close.