run stand
will this set-up work like this . the ECU mounted on the engine block with the ground from the battery.
I would not bypass the ignition resistor, especially if you are going to run the engine for 1/2 hour or so to warm up and break in the cam. If you are going to use any ignition with a ballast resistor, you need some way to bypass the resistor for start, and put the "run" in place
There are several ways to do this:
1---One simple way is with a big diode which you can buy at radio shack. Get the largest current rating they sell with at least 50V PIV (peak inverse voltage) rating, or more.
Wire from the starter solenoid post to coil positive, with the band (ring) on the diode toward the coil.
2---Use a Mopar starter relay or Bosch relay for ignition bypass. You can hook it up in parallel with the starter relay so that both the solenoid and the relay fires at the same time.
3---You can use a Ford starter relay--the "I" contact goes to coil positive, and the two large terminals fire the Mopar starter, taking the place of the original start relay
Here is the simplest way I know. Pay attention to the upside down U on the resistor, which orients it to proper wiring, not shown in the diagram you posted