Front wheel speed sensor retrofit ideas?

Yeah, you tell it what your tooth counts are, so they can be different as far as I'm aware. I just need to do the math and see what kind of resolution I'm looking at. I very well could be making a bigger deal out of it than it really might be. I built a cruise control kit for my 71 Vette years ago in college and learned that one pulse per rev at a wheel surely isn't enough as the math and response time of the sensor would only start reading at some minimum speed and would jump something like 2 mph at a time. Just two pulses per rev was enough to make it work for highway speeds at least, but still not great.

I agree on the tone ring as well, but only if I had an actual separate hub. I'd much prefer the more modern style rotor that sandwiches between a hub and the wheel, but don't know if there is a conversion out there for that or not that still retains the stock calipers at least.