Chevy Upaka the smog motorwas R&Cs low-buck answer to the realities of the early 70snamely, emissions and mileage. We settled on a worn-out 64 283 with double-hump heads. It was baselined (as is), completely rebuilt, retested, then fitted with aftermarket parts from Holley, Edelbrock, MSD, and Isky. The smogger was given one last pull and parked. Two months later (July 1975) it became the beer runner with a best of 154 mph at El Mirage, thanks to the tuning efforts of Darryl Buehl (left) and the Koogster.