I used to toy with vintage bikes that had pressed together crankshafts... to get the cheek off the pin required TONS of force on a hydraulic press. (I had one with a gauge that read tons). To replace still required the press on top of the heat shrinking process.
How much of an interference is it? Couldn't be that tough. If I was really worried I'd pull the pin out and dress down the gear end with a stone. I have a lathe, but you can do it with a drill press or even a hand held drill. Might have to pull the cam to get the pin out.... but thats only a few bolts & if the price is right, why not.
I don't think I would worry about the relief crack either.