I disassembled my original oil pump today to check the end float of the rotors. Not sure of the best procedure, but I used a feeler gauge and a straight edge to check the gap between rotor and pump body, as well as the recess on the cover plate caused by rotor wear. The rotor to pump body clearance was 3.5 mils, and the cover plate wear was about 1 mil. This give a total clearance of 4.5 mils compared to the maximum spec of 2.5 mils (the rotor heights were also about 1/2 mil under spec, so that's a contributor). Also, there is some slight scoring on the bottom of the rotors (see picture). I can easily take out the cover plate wear, but is there any concern taking down the pump body and rotors (to remove score marks) in order to get proper clearance? I know it might be suggested to buy new - and I will if necessary - but I'm trying to refurbish/refresh as many original parts as I can given the general lack of quality I've encountered in reproductions.