I have a question for any of you guys who may have done any stock class racing back in the '60s. Around what period did the first 'cheater' type cams start being used? I know the NHRA gave up on checking duration some time ago just because it's hard to check accurately on these type cams, but when looking back at some of the 60s Mopar stockers I have seen I have always wonderred at what point they were closest to actual being just a blueprinted stock motor with headers as opposed to the radical cammed 'stocker' motors we see today. Would give a better idea of when the stockers were actually close to being stock. I know a guy who ran an F/SA 340 car back in 68-69 and he was running mid 12s but don't know if that was while still running the actual stock camshaft or not. Just a curiousity of mine.