By the Paint scheme it appears to be an old NACA chase plane from Drydon
Al Letcher's "Singapore Sally" at Mojave, CA, (Circa 1979-80)
This is P-51D, N74978, 44-74978 at Moojave Ca. c. 1980. It was used in a movie that was never completed. Three Mustangs were used, this one, N86JB and one other ID unknown. I shot all three on the ramp several times. The third Mustang did not remain at Mojave very long and none carried N numbers during filming. What gives this one away is the replaced tab on rudder. This Mustang had a code # 205 on the side I would have to look through the files to list the others. No idea as to what became of footage, never saw any used any where. This Mustang was w/o in the Shafter hanger fire. Saw remains after the fire was put out nothing left of her but a lump of metal.
Martin / Swiss Mustangs
44-72777 N8064V was at Mojave in same colors, code #212 of fuselage. That was June 1983. Martin / Swiss Mustangs
This is Jack Sliker's Mustang that Mac McLain flew for "Com Tac 303" in the 70's which was a movie about the black fighter pilots in WW2. The movie was never finished.
OOPS !! The hangars in the background are too new for 70's
Steve is right about the movie, after looking deeper into files same info. However mustang is N74978 found photo, full side view. Bob Kennedy