[Mike C]

When it comes to the 12" clutch in front of an SM465, just about any stock replacement is up to the task at hand. So much more leverage and friction surface than the smaller diameter clutches, just doesn't much matter.

I just put a LUK diaphragm clutch in my '86 K30 along with a new LUK flywheel. $150 in parts including shipping.

PO had a metallic puck clutch in it and detritus ruined the pilot bearing. Why they went that route I'll never know, but I wouldn't consider anything like that for anything but towing on pavement. I went back with a bushing and consider that a lifetime repair at this point.