I recently removed my Eaton to get ready for a KB 2.6 install, and found out that the blower had been ported. It has a number stamped on the case below the snout. (not from Ford) I was told this might be a Stiegemeier serial number, but after contacting them they said it was not theirs. Do you know of any other companies that port the blowers that might put a serial number on there? Just trying to figure out who did the porting and when.