Car died while driving, ignition help!
Check supply voltage to the MSD box, get the sheet (destructions) and go through it
You using a Mopar style dist? Check the reluctor gap, inspect the reluctor/ pickup for damage, and "work" the connector in/ out to scrub the terminals clean.
Put your voltmeter on low AC volts in the disconnected dist. connector and crank the engine. The pickup coil should generate about 1 volt AC
"New" does not mean "functionally good."