No spark / No start

How did you judge the "no spark"? Unless you used an in-line spark tester ($3 Harbor Freight) you may just be inferring. I 2nd 67Dart273. Make a bench-test of components w/ distributor removed so you can spin it by hand. Start off by charging & discharging the coil by just using an alligator clip (hold w/ rubber so you don't get zapped). If that doesn't give a spark, your coil or battery is bad. If you can't get anything from the Mopar ECU, you can change to a GM 8-pin HEI module which lets you drop the ballast and get a stronger spark. Many posts.