Check out this link, shows both clutch baskets, the rear shot shows the newgen on left pregen on right, note the springs. The gear tooth count is the same. The inner gear drives the oil pump, it's pressed into place on the pregen, but is on splines on the newgen.
The front shot shows a pregen clutch plate on the newgen basket. The side difference is small but it won't fit. If you were really keen you could file them down & the inner basket rim so it would fit, but that's hard work for little gain, as replacements in future would require a repeat exercise, where as using the designed parts will allow simple replacement later ! And secondhand clutches are cheap.
https://www.dropbox.com/sh/kcg0auipy...fWBY3anya?dl=0