SS/GT. If they only sold 3, I'm not sure how they are legal for Stock or even SS. But NHRA allows a number of paper combos now.

GT classes are neat. Sometimes a carburetor change (AVS to TQ) is all that is needed to go from a traditional SS class to GT. More common is a complete different legal engine combo. There are a number of legal SS/AH cars out there in GT with a different combo than the Hemi.

If the results don't match the theory, change the theory.