69 Dart Hard to Start When Hot, Starts Fine Cold. Vapor Lock?
Brand new Pertronix ignition. That being said, it did the same thing when the points were in there. I will double check the gap anyway.
90% of electrical problems are fuel related.
90% of fuel problems are electrical.
That being said, it sounds like you have a fuel issue because the problem didn't improve with an ignition "upgrade". Most likely heat soak. Today's gas is notorious for that.
You should reroute the fuel line so it goes from the fuel pump outlet straight up and over the valve cover to the carb. Also a thicker carb to manifold gasket if yours is thin will help insulate the carb. It would be helpful to post another picture without the air cleaner.
From personal experience, I first got my 225vrunning in the Fall using my perfect factory fuel lines. Everything was good until the next summer when it started to hard start. I did the SlantSixDan reroute and it's been good for the last 10,000 miles. I used 2 90 degree Holley metal fuel fittings sourced from Summit and regular modern rubber hose. Must be fuel rated because this gas eats stuff up. I'll try to find the Holley P/N.
BTW, the comment about the plastic filter refers to the fire hazard if or when it cracks.
Nice looking car! Just ignore the comments you'll get about swapping in a V8.