supercharger pulley q

[Mike-]

ok so heres whats happened, on my ae101 4agze my current supercharger rattles and knocks a lot so i decided a good idea to replace it, just received my replacement today and the pulley/clutch assembly looks quite different, (it is a ae92, original ae101). This is the first problem.

ive got as far as removing the supercharger drive belt and the s/c pulley is really loose and moves in all directions, so i found the problem with the old one, is it just a case of tightening some bolts and putting it back together or is this s/c stuffed?

if the original is stuffed what can i do about the difference in s/c pulley/clutchs?

all input appreciated

thanks