sounds like you're doing it the way I did. bolt the gearbox on and get the box crossmember bolted up to the tunnel. that'll help the left-right tilt sort itself out. make sure the crank centreline is centred at the front. then aim for about 10mm between steering rack and crossmember (needs to be closer but will sit down on rubber mounts; you'll probably end up shimming it anyway.
good luck!














