Well, I just gotta say, as much starter fluid as this thing has choked down, there likely isn't any oil left on the cylinder walls to make the rings seal. And if the rings don't seal, the pistons can't pull gas out the main wells and that engine will never run.
Right now you need to get some oil into the cylinders to help the ring seal. So take out the plugs and put a tablespoonful or so in each hole, then turn the engine over one turn, and repeat. Then put a charger on that battery, and walk away for an hour.
While you are waiting;
>Check the oil level and quality, it may be partly/mostly gas by now; do what you gotta do.
>make a jumper wire with clips about 6ft long. Later, you are gonna connect the battery to the powerside of the ballast resistor ( figure out how) , to power the ignition system up.
> Go mix up a small pop-bottle of fresh gas with at least 5% two-cycle oil. Then go find a tiny funnel to insert into the carburetor bowl and pour some of that gas into the bowl, about 30 or 40 CCz, or until it starts running into the intake. .
>When the hour has expired, come back, crank the engine over for a few seconds, maybe like 5 or 6, to puke out the excess oil. Then reinstall the plugs,etc.
>Ok next, put the fast idle up on the highest step.
>Next dribble another 10 to 15cc ( couple of tablespoonfuls) or so of that mixed gas into the carb airhorn.
>Then connect the power to the ballast thru the jumper. After this, you will not be able to turn the car off with the keyswitch, but will instead have to disconnect the jumper to kill the ignition circuit.
>Ok, do not touch the gas pedal.
>Now crank it! until it begins firing and keep cranking it until it catches and keeps running, and do not stop until it does or until 30 or so seconds of cranking time goes by;none of this 5-second crank bs. The running or firing engine cannot hurt your starter, there is an overrunning clutch in there to prevent damage. And as long as the engine is firing, the load on the starter is almost nothing, so your little tiny starter supply wire shouldn't get hot.
>If it hasn't begun to run after 30 or so seconds of cranking, STOP cranking! Something is mechanically wrong. Disconnect the jumper.
But, IMO , the engine will sputter for a few seconds, then spring to life, and the Rs will scream up to 2000rpm or thereabouts. If your fuel system is working and delivering combustible fuel, it will continue to scream at 2000 or whatever. If you feel it is too fast, then kick it off the fast idle cam, and just let the speed come down to 2000 or less, but just hold the pedal there until you have proved the fuel system is keeping up. Or about 2 minutes.
If I'm right; congratulations you now know how to hotwire a 73 Duster...... or any other Mopar of that era. All I ask is that you stay away from mine,lol.
If I'm wrong, you'll have to check a few mechanical things,lol....... and we'll have to start over.
