Pic 4, one with the XFV-1 Pogo in it - the building on the right is building 304 - that's where the P-3 was built. The Building on the left was building 309/ 310, Skunk Works, that's where the SR-71 and F-117A was built.
Building 304 saw P-3s, Constellations and P-38 there. There was a small apartment like set up on a mezzanine, I was told Howard Hughes used to stay there bird dogging TWA Constellations being built.