Mine always made a scraping noise at idle from the rotors slightly brushing one another - probably a mis-alignment that would take some machining to fix with new bearings applied. I've been trying to find someone to do the work. When the drive bearing started to go I just took off the whole kit-and-kaboodle and put another manifold on there (it was from a Trooper) - decided to keep the injectors and rails with the SC manifold as they were such a pain to seat. Right now the unit is sitting in a box - I'm thinking of having the whole thing reworked.

-- John