Those contact marks look like they could be older. You'd hear it if it was a real problem. Probably someone installed that blower once and improperly torqued it down, or they ran it with an incorrect amount of oil and overheated the case. Or maybe they fried the old black spider coupler and mis-timed the rotors at first on the rebuild. I don't think it'd be a huge problem as long as it turns smooth and free right now and you haven't been hearing any weird noise coming off it. Send those rotor contact pics to matt at kenne bell and see what his thoughts are... they're the experts anyway.
Also looks like someone ground down a little around the bypass... not a huge deal. Not sure WHY you'd ever do that. Who cares if air flows perfect when you're bypassing the s/c anyway?
If you can find one and afford it... this is the perfect opportunity to pick up a jlp sheetmetal intake plenum for that puppy. You could then ditch the restrictor plate that mates to the stock intake plenum. WAY MORE WHINE
They're like 450ish used IF you can find them, 600 new if JLP still makes em.
Be sure to clean the hell out of that intercooler core, the blower rotors, and the valley if you're planning on ditching the PCV system anyway. It'll stay perfect then. If you're keeping the PCV, then just make sure its reasonably clean when you reassemble. It'd get dirty again anyway.