I recommend getting a Billet shafted Forward Drum & using CKs Shift Recal kit w/Billet Servo.
His #24RRK/SS Rebuild kit contains those 3 w/discount.
I'd also use a 10-Vane Rotor kit. The 13-Vane tend to break more easily at higher rpm & pressures.
Depending on how much spray you use you may want to ask about the .555" TV & .400" Low/Reverse boost valves. They can be swapped inplace of the .500" & .300" size which are standard in the Recal kit.
The splines on the OD Carrier & OD Ring Gear are the next weak link, then the Input Shaft.
I have all 4340 Billet parts in my Trans except the Output Shaft, I don't think I'm pushing 800TQ
I rollerized my own parts, easy if you have a Lathe.
There was a Suplement to Chris' 2004R Manual but, I don't know if He has anymore or if they're available now. A Member on TB.com asked but, hasn't received an answer.