Salsbury 330 torque converters were used on a number of bikes plus just about every junior dragster. Still lots of parts out there. They were bought out by Comet, who continued making only the 330. I have always felt that Salsbury was the top of the line, clearly better than Comet, but more expensive. Mostly used on high end machines due to cost. Salsbury invented the torque converter in the late 30s. I would not switch to a Comet.