Jeep Strokers

Im trying to install an AEM F/IC piggy back computer into my OBD1 computer in my '91 XJ.
Its asking if my vehicle's CRANK sensor is the "Mag/VR" style with 4 wires. Or if its the "Hull" style with 3 wires. I'm pretty sure it's the "Hull" style cause I just put in a new CPS and it had 3 wires.
Does my '91 XJ have a "Mag" or "Hall" style CAM sensor and do I have one or two cam sensors? Isn't there one in my distributor somewhere?
This would help greatly if anyone knows for sure. I think I have the "Hull" styles on both, but need to be 100% sure.

You have one crank position sensor attached to the bellhousing which is a Hall Effect sensor, and you have one cam position sensor inside the distributor which I think is also a Hall Effect sensor.

Hall sensors. If you are going to adjust timing you need to intercept both the cam and crank signals.

Thats the plan. Thanks!