The pump unit in the 32 series is the same.
My GTR has Porsche 6 pot's on it, and i can still flat spot tyres with it.
I'd put a fair but of thought into a Tarmak Rally GTR, and if wanted to build the best 32, you'd fill it with R33 bits. The ATTESSA PRO ecu is day and night compared to the R32, heaps faster, ABS is heaps more responsive (but not too aggresive) , also feeds torque to the front wheels under brakes (found that from datalogging it) for stability, and a R33 transfer case to handle the higher baseline awd. IMO the biggest problem with the 32 is the old tech ECU's, it was bloody advanced in 1989, but tech came a long way by 1995, i think the pumps are fine, just the ECU that drives them.
A R33 ATTESSA ECU would be well worth doing, as you have better ABS, and AWD. I'm not sure how hard it is to disable to A-LSD in the ATTESSA PRO, cause that's the one you want. Only thing you'd want to consder is if the R32 tranfercase can handle running a little all the time.
On another note, where did you get the rotors for your F40's? Are they 2 peice, and 332mm?