Good morning everyone. I hope you guys had a better weekend than I did. I've gotten my rebuilt 304 ci. Y to fire up and run for a brief time. On the initial start up, it ran fairly smoothly, but when it warmed up a bit, the valves began to get a little noisy. We adjusted the valves and in the process of the tuning phase, the engine began to make this loud tinny, popping noise. It won't stay running. I have a pertronix ignitor and flamethrower coil. I started looking through their troubleshooting information, but it basically states that the pertronix is either going to work completely or not at all. They attribute running issues to low voltage. When it began having issues, the battery voltage was low, so I purchased a maintainer/charger to make sure the battery was not an issue. I found 12.45 volts at the coil with the ignition switch off and about 10.5 volts with the key on. I assumed the ignition switch was just drawing the battery down too far, so I replaced the switch. I'm still having the same voltage drop, so I'm assuming that the switch just requires that much voltage. Is that correct? I'm just not sure where to go at this point. I've reached out to the gentleman who put together my 3x2 setup for baseline carb settings. I can't really set the timing until I can keep this thing from popping and carrying on. Any advice or information would be greatly appreciated. I have about a month until we move and I really have to have this thing moving under it's own power. Thanks in advance.

David