Notice the hardware for prizes that covered Fastest Time, Racing Winners (1st thru 3rd) Best Scale Winners (1st thru 3rd), and Best Finish.  Here are links to an article in April 1980 issue of RC Modeler by Walt Wilson.  Page 1,  Page 2. Here are some of the names of the participants
(Photos provided by Walt Wilson)

This is all the participants.

This is just the flyers and callers.