Well I have finally managed to get all the bits for my ideal spec, perhaps not the choice of everyone but it what I've always wanted.

Anyway, I now have all the bits ready to fit when I return to the UK next week, but I'm still trying to figure out what to do with the front diff and driveshaft arrangement tbh.

Car is all rebuilt and running a T4 and siemens 83's, will be swapping the box out for an straight cut Oppliger box fitted and rebuilt diffs front/back, plan after that is to get it down to Tony for a proper map. But to use it in anger I have always had problems with the front shafts breaking, so I'd like to fit something else and change the diffs for something better, and bigger ideally, starting with the front.
What options do I have??? I don't want to go fitting different diffs to the same casing if I can avoid it. Lots of work to do on the car, but now I finally have al the bits!
Car is pretty well specce'd so apart from the lag it doesn't want for much else really, but i was thinking about cams...

Rebuilt diffs by GEARS
Oppliger straight cut box
Fully rebuilt lightened and balanced engine, standard comp.
RS 500 T4
Siemens blacks
MSD fan loom
MSD Fuel pump loom
044 fuel pump
Full Aeroquip everywhere
Konis with eibach springs
AP brakes
RL7 wheels
All spec R tanks everywhere
Samco everywhere
All Stack gauges apart from dash
SECS monitor