5.9 magnum flywheel for factory MPFI

I'm going through a similar situation, and the dual sync is plug and play with the Holley Terminaor X Max with CNP ignition I'm running this time.

I assumed the signal it puts out via Hall Effect Sensors could be used instead of the factory crank position sensor. I didn't look at the wiring diagram for the factory EFI. There are only one or two wired coming from the crank sensor.

Who are you going to have tune your factory jtek ECM?
I was going to run an old Mopar Perf. ECM ( I don't have the part# handy) that I bought years ago. It is OBD1 so it probably would work for what I want but I don't know yet. I figured I could carry the stock 5.9 computer as a backup just in case. If I am not happy with the performance I can always upgrade to OBD2 and then I would maybe have to find someone to tune it. It won't be a race car, I'm mostly looking for a cruiser with good performance.