Not sure the exact cause, two different symptoms.
2018 we were getting ready to leave for a car show, engine started running rough, took car out for a quick spin came back and decided to check timing, turned car off wouldn't start again until I changed distributor..

9/42021- driving to car show car just turned off while I was pulling up to stop light, slipped it into neutral and it started back up. Bogged a couple times while getting on highway on way home. Figured I had some [censored] in the carb and removed carb and cleaned when I got home. 9/11/21- when leaving car show had trouble starting, would start then die, took several attempts to start. Figured still carbs issues, fiddled with it ran good next day. 9/19/21. would start then die, figured it was fuel issues with symptoms. Swapped carbs, nothing, pulled fuel pump, checked fuel pump push rod, looked good, swapped in spare firecore distributor, started right up.
I'm done with this Chinese junk.

Pretty sure Summit has bought out firecore and you can get this crap from them.