Good luck im sure the half cut you need is the chaser JZX81 like mine because of the sump positioning you basically chop the engine mounts off the cut and weld them on to your crossmember (removing the old ones of course ) give the loom to sixworks to sort out for you and i think the auto on the chaser cut fits into you convertion too.......
disclaimer: i don't know shit, please make sure my info is corret before you take it!!! i'm just remembering off one of the other guys convertions, i might even have the modles mixed up