Well, you were right about the fuel pressure. Took my pickup to my local dealership and they found that fuel pressures were "marginal". Replaced fuel pump and cleaned gunk off of strainer and so far all is well. It was expensive but worth the $$ as long as the infernal hunting stays gone. Also, I'm getting one to two MPG better. For that I have no explanation. Could be the cooler weather. I dunno.
Thanks much for all who responded to my post especially MT-2500...!