Header installation

Yes, but! Have a buddy or at least a few good bungee cords.
The thing is getting the torque wrench in the lower head bolts to torque down is a big PIA doing it solo. I’ve done this before. It’s the headers flange that gets in the way. Have a buddy hold it or bungee cords to help.

The drivers side is a huge PIA to install. Not having the head on top help but puts you in that PIA catch 22 head torquing issue.

It can be done. It’s just not fun.

Where are you in Florida?