Ditto. Spin the distributor by hand first and see if you get a spark. That is much simpler than cranking the engine. Best to have a spark tester, otherwise pull the coil wire off the distributor cap and arrange it to sit ~1/8" from a metal ground.
On Badsport's 2nd point, insure you have a tight, solid connection to the distributor pickup. I got a new one that had the wrong double bullet connector with a shorter male terminal that made erratic contact. A regular hardware store connector is a bit different than the Mopar connector and the manufacturer (Chinese?) must have thought it was correct.
