Yes it was a "coach custom". Meaning an aftermarket company like the ones who do limos did it. Notice the "Galpin Ford" license? Notibly lacking in detail... Not to sure what they are trying to hide with the paint scheme. The TV antenna and rear spoiler would be first to go!
The part of the top we can see actually looks better than I expected.
The 44 were done in '77 by Emmiss (?) Coachbuilders out of Florida, and all use the Ghia rear quarter window as part of the top. This one seems to have a "porthole" window of some sort.