Mines a mk2 and part number is:-
23100 12C11 but they struggled to find it with this
A2T02394B is the mitsubishi number and order it off that, all checks out in there book.
it's 12v

70A and a 2 pin plug.
With the 200sx one I'm pretty sure it's multi vee like mine but just concerned that it might not line the belts up and kepp throwing them off, taking the power steering with it.
I've brought the old alternator in to work today on the bus and will get a lift up to the 'Electrical Specialist' after work and to top it off the misses wants to go late night shopping tonight