Years ago, I watched a certain 292 powered '67 Chevy II 2 door post become one of the most dreaded cars at dragstrips all over the country. I watched it outrun V8 cars many classes above it week after week, year after year!! NHRA finally just eliminated the whole Modified Production class because they couldn't keep up with the science that made 'em run!! The man, and his partner both affirmed that the camshaft research is what put that thing over the top!!
That's true! They were first for many years in Modified Production and then later in Comp Eliminator while everyone else that ran Chevy 6 cylinders was trying to keep up. The camshaft and cylinder head was where they were light years ahead of all of their competitors. Another thing that was ironic is that Kay Sissell has always been credited with the "lump" concept, yet he spent his whole life trying to catch up with Headrick's level and never could.
