The first plane in line is N51HA, 45-11586. It was N5423V, then N51HA, then N13LF and lastly N51HT, when owned by Harry Tope. It crashed on July 1, 1990 at Ottawa during an air show, killing Tope.
The middle one is N51MR, 44-73163. It was RCAF 9285, then N6300T, then N5151M, then N5151R, and finally N51MR. In 1974, Ed Messick had it painted in Tex ANG markings, named MINUTEMAN.
The back one is N51JB which is actually 44-63552, but is registered as 44-73029. It is presently BALD EAGLE, with Jim Beasley in Philadelphia.
I owned this aircraft for several years and flew it for pleasure only. I let Robert Guilford fly it from Santa Monica Airport and he flew it into the ground. I lost track after that and was just reaching back for a book that I am writing and wondering whether anyone has any info.
Minuteman participated in the 1977 Hamilton Ontario Intl Airshow