1974 Dart Swinger

We need a little, (or a lot) of help. Our current problem started before the show when the car would occasionaly let out a small backfire when idleing the few days before the show. Then when driving, it ran very rough, accelerating poorly and feeling as if it was on 7 cylinders. We got to the show and were coming home when the car died two blocks from home, suddenly dying and rolling to a stop. It would turn over and fuel wasn't an issue as we could see it getting plenty. But it sounded as if it just wasn't getting any spark. An old man came out to the road from his house and said he thought our coil was bad. It was an Accel Super coil pulled from a junk yard Dodge truck over a year ago and had been doing fine. However I thought I'd swap out the Accel with the stock one and see what happened. No change, it still just turns over spewing fuel out of the carb and not firing. The wires, distributor, cap and rotor are all new. I'm dumb-founded on what the problem is. Any ideas? And, what should the "ideal" timing be set at? Would this greatly affect the car? The distributor is not loose. Man, of all the things to deal with on a car, I HATE electrical problems!

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