Camshaft Identification

hey all,

I bought my 1973 dart swinger about a year ago and the engine was a built 360. It was built before I bought it but unfortunately I cannot chase down the exact cam they put in it. I know it is a big purple cam and it has a Holley 650 and a edelbrock performer intake.

My question is, how much do I have to take off to get to the stamped I’d number? Would it be on the end of the camshaft or the top of it? I would assume that would be the difference from removing the water pump vs the intake. I’m trying to figure it out to get the best ignition timing as it seems to not find the sweet spot right now. Thanks in advance for any replies!