I use a hall effect gear tooth sensor for my speed activated switch. I needed 5vdc pulse input. I used a 12vdc to 5vdc power supply feed the + vdc and - vdc and +5vdc pulse output. I used the front wheel studs for the pulse. You could easily use the same style sensor on the rear and front to feed a hall effect signal into mega squirt for traction control.
I experimented with Hemi Goldbox and found out quickly I do not have engineer tuning skills for ignition and fuel. I purchased the gear tooth sensor from Digi Key, $25.00 plus shipping.