Edit: Re-read the post. It could be the aux air circuit. That tricky sticky valve tends to cause a lot of issues with the D-Jet systems, second only to the points themselves. If the issue is hot only it's less likely to be the points in my experience - mine only gave issues with a COLD engine when the trigger points were fouled.

__________________
Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k