70 Duster runs rough or dies when up to operating temps

@70DUSTER/74SCAMP

Do you have the cam grind that is in the engine? That would help a lot. Also what type of vacuum is it pulling at idle of about 750-800, lumpy cam set it to 800-850 and see what happens. I'd set the idle there and tune it a bit for close to highest vac reading. Lots of suggestions how to set via vac reading by searching the board.

You know where the timing is now. Try this if it's easy to do. Flip the wires coming out of distributor. If the timing retards, put them back to original position.
If it advances timing, wires were hooked up backwards to start with. Reset timing and move on knowing it is now wired correctly.