Hi CaptnK, There were a few generations of Corvette from the late 1960s with thev premium mid arch base (as opposed to the low arch Mayfair base) then a high arch introduced in the late 70s which was continued into the final side pull full crank phase in the early 1980s. Not sure there was ever a Powertorque Corvette but I don't think so. Can you post pictures?

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!