I drove the bronco out one morning, came back no problems. Couple hours later I try to start it and it turned on for a second, then turned off. Ever since then I haven't been able to start it, even with starting fluid, which makes me think it's more likely the ignition module. It keeps wanting to turn over, but just won't catch.
Getting spark and fuel? Remove the #1 spark plug and rotate the engine by hand until the cylinder is at the top of it's stroke. Check the timing mark on the harmonic dampener. If not lined up with the timing mark on the timing chain cover, rotate the engine another 180 degrees. Remove the distributor cap. Check to see if the rotor is lined up with the #1 plug tower. If not, the timing chain has slipped.