what clutch activation does this use?

just stock 1200 cable???

1200 clutch cable.....also uses the 1200 thrust bearing fork/lever.......

what about things like gear stick, where it comes through? and mounting the box do u need to make custom mounts? and tailshaft, do they make the kit so u can still use the 1200 tailshaft?

stick comes out slightly further back, so you need to elongate the hole in the tunnel. Custom mounts will need to be made.....shorter drive shaft will also be required.