Need some help on a C4 topic. I'm an old C3 guy that needs help on the new engine format. I need to identify a C4 cam as I'm re-building my engine. The cam that I pulled out is a hydraulic roller with a stamp on it between the front journal and first lobe set. The stamp reads “CRP” “0.490”. No identification on the face of the cam behind the timing gear. I’ve got a lot of experience on old Chevy hot rods and need to try and identify this cam for dialing it as well as selecting the correct timing chain package. Would like to understand if it’s stock or not. If so where can I access a spec sheet, if not OEM, any good guesses on its possible after-market manufacture.