Does your accelerator pump shoot in fuel when you open the carb when cold?, when hot? If so, test the + voltage at the coil(Not at the spark plug tower). It should be around 6 to 8 with the key on(key in Start 1= run = through the ballast resistor) and 12+ with the starter cranking(Start 2 = Cranking).
Mopars use two "12v" feeds to the coil, Start 1 & Start 2. This was to boost the coil output when cranking to reduce hard starting, and run the car on reduced voltage to increase the longevity of the coil etc.
If you only have the reduced voltage from the ballast resistor when cranking, you may not be getting the bypassed straight battery voltage(Start 2 = 12v) when cranking. This can cause the starting problems you are having.
What is your initial and total timing?
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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