6. Cylinder duster is now a 340 ignition issues wants to start when you let up on the key

The 1/2 ohm resistor is needed to protect the coil when the engine is running.
A newer ECU will not need the 5 ohm resistor. Having it there won't hurt, its just not needed.
The top pin of the ECU is the power connection. Wire J2D in the drawing. That connection is needed.
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A place to buy a paper manual
http://www.autobooksbishko.com/Items/1975 Chrysler Dodgecar Plymouth Shop Manual/651.html