Ok,
We built a 2003 IS300 Twin Turbo back in 03-04. The tech that built it is no longer here, and it's a nightmare. My GM just asked me to jump in and help.
This car is suppose to have a Turbo Supra driveline in it. I pulled the numbers off the trans casing and the driveshaft.
I tried to have our Parts Department help out, but no luck. Does anyone know where I get the info I need to verify? I tried to Google, but no luck, and our parts store online doesn't seem to find the numbers I have.