Here is the cover from the December 7, 1973 issue of National Dragster.
Note the smiling guy on the far right. Supernationals winner.
The caption reads:
After the smoke and fury that was the NHRA’s 4th Annual Supernationals settled at Ontario Motor Speedway, these five men remained as victors in their respective classes. They are (l. to r.) Don Enriquez (Pro Comp), T.C. Christenson (Pro Bike), Tom McEwen (Funny Car), Don Garlits (Top Fuel), and Wayne Gapp (Pro Stock).