I tend to agree with Joe on this one.
Did you reconnect engine speed sensor. This connector is known to make engines stall maybe it can keep them from firing up.
Also a Dodge Diesel owner was having trouble with his truck starting in the midwest. He had a fuel at one injector (that is all he checked) and getting air.
Turned out to be fuel shut off solenoid was not moving all the way up at start. He pushed it up and it started no mor problems as of yet.
Just a few things to check out if the 180 isn't the cure.