By MSD description, NHRA accepts this as legal. So I would "think" it is accepted as an ignition box only for class racing

Liteweight
Daryl


68 Hurst LO Hemi Dart 70 hemicuda 4 spd. R code owned since 76 70 GTX 4 spd. 21,000 orig. miles 55 Ford F100 chopped,slammed,bagged & supercharged 96 Ram 2500 4X4 Twin turbo'd Cummins 550hp 1200 ft. lbs tow vehicle