Cant get it to turn over

One thing that comes to mind (in 74!!!!) is the seat belt interlock. Look under the hood for a box about the size of a horn relay with a reset button. Cut the two yellowish wires and splice them permanently together

Here:

http://www.forabodiesonly.com/mopar/showthread.php?t=14304

http://www.forabodiesonly.com/mopar/showthread.php?p=1969624169

Other than that it could be the clutch safety / neutral safety switch either wiring, the switch, or linkage adjustment.

First, try taking "something metal" and jumpering across the two largest exposed terminals on the starter relay. Engine should crank. Be certain it is out of gear