Hi Guys,

Does anyone know if the stock / factory camshafts have "GM" part numbers stamped on the cam? I'm trying to figure out of if i have the STOCK cams in my LD9. My mechanic feels the lobes look aggressive for stock application. I know the casting numbers are the same in previous years, and im unable to measure the lobe at this time. Should these cams have a GM part number?

thanks