We already know that P-51 #1 (the one closest to you) is Max Hoffman's 44-74832 N6310T. The 2nd was CF-USA, Don Plumb 44-74850. This P-51 crashed 1975 in Texas (Plumb k).

Thanks! to Vlado Lenoch for this information.

The 4th P-51 is 45-11586, N5324V owned by Walter Oakes based in DuPage, IL. Aircraft was restored as "Death Rattler", N51HT and owned by Harry Tope who was killed in this P-51 in 1990. The 5th P-51 is 44-74756, N2112 owned by Bill Ross in '67 also based in DuPage, IL. This aircraft was later registered as N68QF, Ken Bernstein, race #33, "Miss Susy Q". Bernstein crashed this aircraft in Mojave 1976 (Bernstein k). The 6th P-51 is not a P-51 but a Fairey Firefly TTMk6, CF-BDH from Canadian Warplane Heritage. Perhaps lost in an accident in 1977?