Took your advice Texas and grabbed new springs as well, went with the walker clutch kit (I think they're made in New Zealand under Pyramid Parts, had success with their kits in the past) for $67 bucks shipped. Looks like someone had previously replaced all but two of the friction plates. Got everything bolted back together - old_kaw hit the nail on the head, that thing isn't slipping an inch! They were definitely toast, the amount of clutch pushrod adjustment after the install was pretty significant. Threw a bonus pick of my brand new rattlecan silver flake job in there for good measure!