LH 2.2 distributors have hall sensors in them with a 4 vane wheel. All you'd literally have to do is install it in place of your 2.4 distributor, supply it with 12 volts and wire the ground and sensor out to your crank trigger input.
Change the jumper on your 3.57 board to hall input, change to basic trigger in your MS software settings, and carry on with life.
If the trigger is the only thing holding you up and you're sticking with distributor, why make life hard on yourself? Put your baller flywheel in and change the distributor. Problem solved.
Edit: Holy crap, I just missed all of page 159