70 Duster runs rough or dies when up to operating temps

Stock 904 transmission with a aftermarket stahl convertor i thing 2500 i was told, bm shift kit. with z gate shifter. hydraulic camp , lumpy one. stock internals. aluminimum eddy intake and a 1405 carb. choke is actally pinned back but when warm at 70 out or higher i wouldnt think it would run rough. i am going to try and back fuel pressure down , raise timing a hair and back idle down. also check the reluctor gap . it idles at 750 when in park around 600 in gear. Getting ready to head out and see what we can come up with i will let u guys know. i took the day off to work on it lol.....and possibly have some busch lights lol
A 150 RPM drop going into gear is too much. Likely your initial timing is too low. You want to aim to only have the engine drop 50-75 RPM when going into gear. What kind of distributor are you running? Stock Mopar, MSD, etc.? You will likely need to check the timing curve as well. Lots of performance/economy can be had from fine tuning the curve.