I looked at this car back in 2017, along with a 67 GT500 that belonged to his ex wife (it was for sale). Sorry to hear that the owner passed. Interesting guy. Had several Mustangs/Shelby's over the years. I have a '69 Boss 302 that he owned in 1970 - 71. The '68 was not for sale when I was there. I may be wrong, but I do not think that this is actually the first 1968 Shelby built. There were several others built before this one. Maybe Pete can shed some light on this? The 1967 GT500 had an interesting story, and I heard that it finally sold but I do not know where it went.
Ken