I don't remember exactly what I did when I swapped the one piece rms 350 in place of the old 305... I'm thinking I just put the pressure plate/disc on the new flywheel but I'm not positive. I'm about to start looking at clutch kits in case I have to replace the current one in the '78 (pedal feels like something is stuck/bound up in the bellhousing area), and may step up holding power a little (could feel the clutch slipping a little on quick shifts).