Didn't Grumpy win with a Camaro and maybe another Chevy earlier in the '60s, though? Before the Vegas? He was an amazing engine builder, (as was Smokey and Keith Black), those were some great times in drag racing.
And 3 deuce engines are great when set-up right. I had friends with 440 6-packs as well as one with a AAR 'cuda back in the early '70s, they were great on the street because they could baby-foot them and get okay gas mileage using only the center 2-barrel if they kept the revs low. as soon as you passed about 2500 rpm, though, it was party time and of course very hard for a red-blooded young guy to show any restraint.