[RSwank]

I wonder if possibly the B-29 was assigned to one of the post-war guided missile test groups located at Eglin. There is mention of B-29s assigned to such groups, such as the 1st Experimental Guided Missiles Group. Perhaps the plane was damaged (perhaps even just a ground accident) and it was abandoned.

In comparing the length of the plane vs the wingspan and the distance from the nose to the wing root vs the wing tip to first motor, the ratios don't seem to match up to a B-24 (or Privateer for that matter). They appear to very close to a B-29. I suppose another possibility would be a B-50.