Trying to jog my memory after almost 38 years, I originally thought this was a Schaefer Qualifier, but I could be wrong. What I do remember pretty clearly: This is the night Billy Pauch's L car broke early in the show, and he jumped in Ron Stashek's #616, which was an ex Scamardella #121. If you look closely in the pits, in the background of the picture with only the #24 car in it, you can see the Green IH Scout, facing the grandstands. That was the rig that carried the #616 to the races on this night. Funny the stuff you remember, dont ask me to tell you what I did last week...LOL!
When I saw the #24 I immediately thought Ken Brenn, jr., especially given the picture on the homepage of Kenny standing next to a similar looking car with the blue #24, but if you guys think its Jimmy, I'll go with that..
Couple other observations:
I think the car next to the #301 is the Blue Hen #30, maybe with John Kozak driving, and a real guess is Bob Fisher's #54 on the inside, mid pack, in the same picture.
The #99 is definately Bob Malzhan.