This might be an ignition problem. How does the coil look?
Agreed, this is a good area to look. In fact, you might also check the wiring coming off the sensors, the alternator, and just about everywhere else, for frays. This can be time-consuming, so patience is required. I had a similar problem on a Dakota (hot stalling immediately after starting, but not while driving) that was caused by a frayed wire near the connector to the throttle position sensor. A butt splice fixed it.Is this the engine where the distributor wiring runs under the intake manifold? There were problems with those due to chaffed wiring.