KCF Rallysport @ Kippa Ring ( 3203 1546 ) should have no probs with the loom nor anything else you can throw at them, you can use the RB20 loom and use the RB25 plugs on the 20 loom + R32 Ignition Module ( If S1 RB25DET ). As for the 34' gearbox last I read it can go into a R32 but does require some adjusting, not meant to be a straight fit due to the trans" tunnel not being big enough or some crap along the lines of that.
Sorry for the late reply just saw this thread, you most probs have all sorted by now any way.