i get a kick out of 3/4 or full race cam shi$.i sold hi po parts for 25 yrs.and i dont ever remember seeing them listed that way,until a real ol timer came in with a old book and all it had was flathead speed parts and sure as shi$ in black and white was a listing as 3/4 cams!/ but not on conventional v8s. hey scooter i bet the mexican was talkin about split duration cams.