you will be going from a single stage clutch to a dual.
i'd think you may need the flywheel from the 8spd.. MAYBEE. I've not done the swap and am not as mucha 3 cyl guy as a 4 cyl.
as for output. easy to tell.. check the parts manual and see if the pinion coupler is the same part number. if not.. you can split 2 and weld and make it work.
pto shaft will be the same..e tc.