Pretty sure it's constellation, a C82, or another large prop. plane of that time frame.........but I doubt even the skyraider prop. is that large so likely a multi-engine plane.
One clue would be the mustang spinner suggesting a possible link to air racing.
It's possible they are left over from a couple of cannibalized and super rare and desirable "slow nose case" gear cases that the racers put on 3350s.
These slow nose cases came from super constellations.
Just speculation as they could be from any large plane of that time........except the b36 which had props even larger.
Was there any other aviation related hardware there?