Ok, been talking to the Delta ABS guys, who make a nice, newer, cheaper alternative to the Bosch ABS stuff. I told them about how the removal of OE ABS sensors cause the loss of RPM/MPH function, and I want to retain that, and this was their response below. Any of you 370Z electronic guys
Talked to a few TT/race guys a track event using this system and they really liked it.
https://www.deltaabs.com/
The Delta ABS system transmits data via can, so if you can find someone to program a can bridge of some kind to transmit wheel speed data back to the factory cluster then you can retain that functionality, but the CAN stream within the Delta ABS unit is fixed and is not configurable. The Delta ABS system is very much universal, and if you have two-wire hall effect wheel speed sensors from the factory then you can reuse those and simply install the included wiring harness and ABS module and sensors, there are no vehicle specific instructions, installation and setup is the same on virtually any vehicle.