Are you sure this is not 1987???
The reason I ask is that body Billy is running, is an ex-Budweiser King Tempo he got at Indy 1986 after he grenaded a blower in the lights and lost his Mustang body.
Bonus Question-
Who drove the Kodiak/Blue Max car at the Allstar event event at the Motorplex that year??
I'm guessing this is from 1987 and the Tempo body became his spare. I do remember him running that body at Maple Grove in 1986 after getting it from Bernstein, and there was a painter still hand lettering the car at Reading. I thought he had switched to the yellow Olds Firenza body in 1987.