The last TQ I bought was one from Koffel. It was listed as a 9801S, but turned out to be a 9000 series, regular production carb. I ended up keeping it anyway, but still was disappointed. Some guys don't know TQs very well, particularly the old Chrysler racers. I had a conversation with McCandless many years ago and was discussing the SB rocker shafts and he didn't know the 273 shafts had the oiling groove in them. They may know Hemi's real well, but some of the lesser engines they never messed with them at all.