msd 6al no spark at plugs

I don't understand your comment about the push button. Be certain that the "big red" is wired direct to battery, or at least through a master switch, and that the "small red" is going through whatever you have for an ignition switch. Also be sure that both those wires are "hot" when the starter operates

I don't know, if you are switching BOTH the "small red" and the "large red' through the same switch, the big one may have to get power before the small one, due to the circuitry. The small one acts like a relay trigger, but I believe those are solid state switched.