found on http://theoldiebutgoodie.tumblr.com/image/63281528684
not sure what to make of the rims... except they look like strong rims meant for racing with corners or circles... but the intake tubes make me think drag racing- and the oversize tire cutouts? huh.. lots of tire travel expected
Shooter probably has the answer:
comment at 3:36 AM
I grew up around dirt track stock car racing.....and (except for the exposed injector stacks) this looks just like what I watched race in the mid-late 70's. Fiberglass bodies began showing up in the Late 70's and were on all competitive cars by 1980.
So, my guess would be either asphalt stock car racing or Pikes Peak Hill Climb.