The problem with the early mag setup is the computer won't let you do any upgrades.

This would allow some upgrades without adding much more to the efi system, and let you run a newer engine.

The painless system uses the shutter wheel and halls effect sensor. Just not sure how it matches up to the ford system, or if it would be helpfull to anyone to make a few more of them.
It just drops into the mag distributer.