i dont know if the traction worked or not, but even if it did it wouldn't be very adaptable to a considerable power increase.
i chose to run Racelogic traction control in mine, but eventually removed it becusse i didnt really need it, the car drove very predictable, but it wasnt really ever used in the rain....so
the tachometer worked fine on mine, even after i swapped to the 180mph TTE clocks
the only thing that didnt work, and thats because i didn't want it connecting back up was the aircon
even my fuel gauge worked fine