I want like to kno what engine i have in my 1969 coupe deville, its said to have the 472 or 500. But my friend had the same car awhile back and said his engine was way bigger then the one i have. It seems to me i have a 425 someone swapped. Does anyone know how i can tell what motor i have everytime i order sum parts im alwayz having issues. someone helpppp.