That could be...interesting - gen2 has a different intake port bolt spacing, intake manifold & throttle body for starters, and the gen2 throttle body isn't compatible with gen1 wiring (as far as I know). It looks the same but once you go to fit it the holes don't line up. A friend recently tried to fit gen1 kit to a gen2 motor recently and discovered how badly it didn't fit.
Also the gears work the other way around, though I guess you ought to be able to fit a gen2 shifter.
There may also be wiring differences but haven't got a gen2 so can't really comment further.