If you look at the 1980 Historic Aerials view of Miami around where the junction of
NW22nd St and NW68th Ave is now - where there is now what appears to be a ramp up onto a roof top car park for the western most cargo sheds - you can see what I think is the compound with 5 C-46s aligned E/W and the DC-7 aligned N/S between them. Can't link to the map and screenshotting invokes a copyright warning....
I'm sure all that area had been/was being redeveloped by the time I visited in early '84 and the threshold of 09R extended westwards to where it is now. The friend I was travelling with mentioned the compound which he recalled on a previous visit around 1979. I think we did look for it but he was pretty sure it had been flattened.
Ah, the Miami Airways Hotel - remember staying there on a later visit!