The car is legit. It is pretty well known among the Ford community. It is actually 1 of 2 Kar Kraft cars built to be campaigned by Bud Moore in 1971. The cars were never fully completed or raced by Ford or Bud Moore. This car was purchased in the mid 70s by Ed Hinchcliff, a Ford engineer. It was raced from approximately 1976 to 1981 in both the SCCA Trans Am and IMSA GTO. It ran with a 351 Cleveland Bud Moore type engine.
The car has been owned for many years by an Illinois collector (the VM ad was listed by this individual) of vintage Trans Am cars -- among the cars he previously owned were the #77 1070 Challenger and the #6 1971 Championship Javelin. This car has been marketed for near 20 years-- at a very high price. $200K plus.
The second car was purchased and raced by Warren Tope (his father was a Ford VP). It also raced in the mid 70s in both the Trans Am and IMSA GTO. After Tope's untimely death in a street race in Pontiac MI in a McLaren Can Am car, the second car was purchased by Bill Maier and raced side by side with its sister car in again, both the Trans Am and IMSA. Hinchliff and Maier are good friends.
The Tope/Maier car was purchased in the 80s by a Southern California Ford collector and has not see the light of day since......at least publically.
Attached are period photos as run by Hinchliff and Maier