Good question, as I'd already swapped out the front to a hybrid S13 (Hubs, Knuckles, Brakes, coilovers) /S14 (tension rods, LCA, Tension rod Brackets) (although Abbey did have to fit longer tensions rods from an R33(?) as the castor was crazy), I had the ABS sensor on the S13 Hubs/Knuckles, so we're using that, it's mega accurate.
Thanks, I'm very happy with how she came out