I think this is 44-74602. There is a picture of it in the book Chino by Joe Cupido on the 1st page of Chapter 12.Here is the history:
P-51D 44-74602 (to RCAF as 9255): BOC 6.12.50: SOC 1.11.60 41142 •
N6318T James H. Defuria/ Intercontinental Airways, Canastota NY 30.12.58/60 (ex RCAF disposals Fort Macleod ALTA)
Aero Enterprises, Elkhart IN 19.8.61 Robert E. King, South Bend IN 11.61/63
Aero Enterprises, Elkhart IN 27.3.63
N35N C. E. Crosby, Bellingham WA 20.5.63/67 (race #3 "Mr Choppers")
N3580 Jack C. Hovey/ Hovey Machine Products, Walnut Creek CA, later Oakland CA, Ione CA 10.7.67/08 (race #2 "HM-P")
Yes, this is definately N3580 44-74602. I have several shots of it in this scheme.
My dad and I flew up to the Reno Air Races in 1970. He brought a super 8mm camera and took film of Bob Hoover flying a black Mustang with red trim, marked n3580. Dad just had the film digitized and have just watched it. Seeing the reg number, I thought I'd google it to see what information I could find and it lead me here. He actually took quite a bit film at Reno. Dad was a career engineer with North American and quite fond of Hoover.