Not the Beech Pave Eagle, Kitbag, but you're on the right track, i.e., this aircraft was a military version of a standard model from a major manufacturer. It had an unusual military designation.
A bit of background to keep things fair. I found this photo and attached info on a website with an excellent pedigree, but I have also seen inflight photos of this aircraft with two side-by-side crew seats, not the single crew position shown.
In any case, the structure surrounding the central instrument panels appears to be the same as the civilian version, which I have flown. This is certainly not the only civilian aircraft to be adopted by the military and retro-fitted with a single central pilot's seat. I don't know, but I suspect this mod involved only some of the several dozen -A, -B and -C military variants.
General hints: Think 1950s, US Air Force, and an engine with an odd number of cylinders.
[Edited to confirm Kitbag's assessment as a US military aircraft]
Last edited by ozbeowulf; 26th Nov 2007 at 09:36.