Nobody in the Supra realm would probably know. I'm not sure what the big deal with using the stock crank angle sensor would be for MegaSquirt, but I don't know what type of signal they'd be sending out.
Typically, a hall effect sensor has three connections (12+, ground, and signal, I believe), but the plugs for the Toyota sensors only have two connections. I've considered that the sensors could be grounded through their mounting. I know I could take them off and test them like I did for the hall effect sensors for my motorcycle, but I'd rather not ruin them if I mess up. Also, just because I might get a signal from the Toyota sensor, doesn't mean I'm getting the right signal, necessarily.
I'm fully aware I could just go with EDIS, but 1.) I intend to use LS2/truck coils, 2.) I don't want to bolt a big ugly 36-1 wheel on the front of the 2JZ and using what's already there is ideal.
I appreciate any direction.