1977 C25 454 cam ID

[cottonme173]

Hey all! I am in the process of tearing down my 454 and just pulled the cam. The push rods and hydraulic lifters are aftermarket and I was hoping the cam was too! I pulled the cam and it looks to be stock, but I wanted to id it just in cast. It's a hydraulic flat tappet cam. Here is what I can make out (I think) : from the back: GM28 then a few lobes down is 3545 then at the front is a M. Any help? Stock or a bump up? I am looking to go just above stock for a street cruiser.