Has anyone actually measured the stock crank pulley, and the aftermarket unit? I'm looking for a measurement that doesn't include the lip around the pulley, just the diameter of the section that the belt actually turns on.

I saw a post on here that said 7 7/8 inches, but that can't be right. Using that with the size of the factory blower pulley, you come out with a stock blower rotation speed of over 14,000 rpms, which is beyond what Eaton says is the maximum limit.