great photo find, Silver Bullitt!
the #86 and #98 images seem to be from the SCCA Divisional race in Feb 1964, which would make them CSX2173 driven by Fito Hafner and CSX2136 driven by Ed Leslie
any chance the other photo is from a different race? say, the Riverside Grand Prix in Oct 1963? that race featured both the Executor CSX2128 (#96) driven by Allen Grant and CSX2136 (#98 with pinstriped grille opening) driven by Lew Spencer