COP Ignition Development

I put the unit on today. I found that my test distributor shaft was too long. A SB is 3 7/8", but the shaft measured sightly more than 4", so it was from a RB. I changed the shaft out, and found my other NOS distributor shaft is 3 1/2" for a BB. The good is I have 3 different lengths for reference. I found info here: http://www.hotrodreference.com/1310/mopar-distributor-identification-by-shaft-length/
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Installation was simple with the pre-wired harness and coil assemblies. Drop in distributor, static set base timing, connect ground, hook power to bypassed ballast ignition source. Connect coils to plugs.
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I got the car started, some trouble with that, but once running, it ran great! I took it for a short drive, it was flawless. The settings replicate stock tune for a 66 273 2B.

I need to focus on the starting problem, I think it might have to do with starter noise or power supply noise immunity issue. I tried to use the regulator that is on the Nano circuit. Typically I use an automotive rated part, with additional parts for transient protection. I have parts and circuit space, so can add a better regulator. I will do some probing with a scope, and see what I find.