It would appear that the car did have Hi-Tork or Koni horizontal shocks at one time like the Chaffey College race car, although mounted
further outboard so they were outside the rear frame rail. Maybe this car saw some autocross/gymkhana/slalom activity, but it is unusual
to see this stuff on a big block car. I agree that you would expect to see the much more common traction bars mounted under the rear
spring on a car like this. Thanks for sharing the pic.