Thanks for posting these Steve. Great mix.
I'm not sure but the #3A (check out the header/exhaust on it....) in the bottom picture from the pits at East Windsor might be Mike Geiser. The car between the #3A and the #292 might have been a #82?
What I am sure of though is that it is from 1975. That's Al Michalchuk's dad (his pit crew) behind the #292 in the flannel shirt.