70 Duster runs rough or dies when up to operating temps

Edel/Carter AFB/AVS carbs will run comfortably with 8.5 psi of fuel pressure.
Why a specific FP might be specified is because it changes the fuel level; so float level setting may have to be adjusted to suit FP. My experience with these carbs is that they are not overly sensitive to FP or slight differences in float level settings, so I doubt this is causing the problem.
Also, not pick up wires reversed. That causes a drastic change in timing & misfires. Since it starts, runs & idles great, this cannot be the problem.
Since the problem only seems to occur once up to operating temp, I would check for the choke sticking on or the blade loose. It could also be electrical, something failing when hot. These ign systems do NOT supply a full 12v to the coil in run mode, nor will they work with a coil that is designed to use a full 12v [ no bal res ]; your measurements look OK for coil voltage, but the bal res HAS to match the coil. The Mopar ECU uses a 0.5 ohm bal res for the coil. If the coil was designed for, say, a 0.8 ohm BR, then it will getting more current than designed..& getting hotter.