another question about clutches...mix\'n match parts Aight, I'm using a 91 flywheel from a 350 with a 79 mechanical clutch 465. What size flywheel do I need? Also, the parts guy asked me what the length of the input shaft splined area was. I don't have the tranny with me to measure it. Is there a way to get this info without having it? I got a quote on a Powertorque clutch from Advance Auto for $116 or 106. There was some sort of difference between them. Help me out please.