Electrical driving me nuts

Hello everyone, I have a issue with my old 1973 Plymouth duster. Has a 383/727 for 25 years now. (It has electronic ignition )not wanting to start at times.It will not fire (some times) after the first start of the day..It starts right up every morning and if I shut it off and try to re-start it's not getting fire. I have replaced the ballast, Checked the coil, checked all of the wiring and connection's, Replaced the pick up coil in the distributor,Cleaned the ground where the control box is bolted,Replaced the control box etc.. I was messing with it yesterday and noticed that when it does this, When I'm turning it over and let off the key switch it will try to fire and start up. It seams like I have ran into this before on a Dart I was working on, But I can't figure this out.It runs great and does not try to die on me when driving it. WHAT AM I MISSING??. I know I'm getting old and forgetful but I just can't figure it out. I think I need some of that new medicine for memory . Any help or suggestions will be greatly appreciated. Thank you.