What is this switch?

Old Tired Rebel said

Yes it turns over using the key. I ran a jumper wire to the coil no change,then ran it to the module no change. I have not done both at the same time. My son wired up everything for me and I double checked behind him. The blue and brown wires are connected and ran straight to the dist.

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The module and coil both have to have power at the same time.
Don't buy a starter relay, the car cranks and the HEI's power supply comes directlt from the ignition switch (or will) so the relay doesn't have anything to do with the thing not starting because of spark.

Go from battery Pos, to coil+, to module+ and try it.