I have a 2 spd powerglide mated to my 230 inline 6 in my 66 Nova II. Prior to doing some engine work it seemed to shift okay. However after swapping engines, and camshafts it doesn't want to shift anymore. My dad told me that a guy at the transmission shop said that if we put a camshaft in the engine and ran it at high rpms even without the car moving would cause the clutch inside the transmission to burn out?? I've never heard of this before...is this true? We had orginally installed a clevite camshaft that required the engine to be set to a fast idle (high rpm) but we replaced the camshaft with a Competition Camshaft with a lower rpm range and now the transmission won't shift.