I am gonna sound like a D-bag here but some of you guys are hand wringers
It was a head replacement. There are 6.0 Fords on here that are running around that had the body off to do head gaskests and studs, rebuilt rearends on trucks, rebuilt transmissions, Injector replacements on diesels, Cam replacments on AFM/DOD engines.
We are talking about a head replacement on a small block push rod engine. Day one stuff. They don't even have to set lash on the valves. They are self adjusting.
OP put it on the floor, it will be fine. The Hemi head replacement is not much different than an LS based motor. I did heads and cam in my garage on the WS6 60,000 miles ago. 500 11 sec 1/4 mile passes later and not one issue.