A manual GS would be cool to have B)
Manual supra boxes are expensive from what I can gather, lots of folk after them. Not sure what the output of the manual box is like either, you may need to fabricate a prop shaft. As the GS was never a manual, you may have some fabrication to so to get a pedal box up and running. Engine mounts shouldn't be an issue.
One of those jobs that would be much easier to start with the Aristo and already have the twin turbo install sorted, just leaving the manual conversion to do.
Sent from my iPhone using Lexus OC