I'm trying to figure out the differences between the supercharger snout seals. I've seen posted on the forums here the part # 7965 but I've also seen 7966, 7967 & 7968 for the Eaton superchargers. What’* the difference between the seals? As far as I can tell they are all the same size. Also, does the same seal work for the M62 and the M90 and the new M112?