Which is better?

Theres the 2 basic automatics, 904 and the 727. Theres a few versions of the 904 that go by, 999, 998 and 997 I think, I forget to be honest with ya.

Theres 2 manual trannys. the 4 spd and the 3 spd.

To finish up what your asking above, you'll need to weld in the bracket on the frame for the Z bar to sit into. Also, cut a hole in the floor area for the rod, from the clutch pedal to go through to the Z bar. There is also bushings in the ends of the Z bar and assorted little parts in that area as well as the ones I'm sure you know down at the clutch fork.

If someone could post up a picture of this set up....we'd both be greatful. Thanks crew.