A bit off topic but while searching for a better definition of SB/BB I found this interesting innovation (cheat is such a harsh word).

"From NASCAR, in the late 70s and thru the early 80s, from about the time they transitioned from big block to small block engines, there was an engine shop in Michigan that was building, for some top-flight teams, something that became known as the "big block small block." Another piece of whizbang engineering, the guy had engineered a small-block Chevy engine so that the front two cylinders were of legal bore for the maximum 358ci (6.0L), but the back six cylinders were bored out to where the engine totalled in the neighborhood of 430ci (7.0L). When inspectors would pump-check the engines after a race, they would always pull the spark plug on the No. 1 cylinder (or the crew would already have it pulled for them). This went on for a long time with the perps not getting caught. I believe when Petty got his 198th or 199th win at Rockingham in the early 80s, and there was the controversy about his engine being oversize was when someone in the post race tech line got wind of it and checked the volume on a rear cylinder."