Went to U-Haul on Monday. They didn't object to my hitch, and the trailer and the engine don't exceed the weight limit for a '67 Fury without the factory tow package, but my electric hookup doesn't match anything they have. So if I use one of their trailers, I have no lights on it.

Considering renting a pickup. Engine stand is like $50-$60 at Harbor Freight, hoist is about $160. I'll need the hoist at least three times (pick up replacement engine, pull current engine, install replacement engine), so buying it might actually be cheaper than renting one.
Yes, I am the procrastination king.