A final summary to my PO300 code. After replacing air filter, fuel filter, fuel pressure regulator, cleaning EGR, EGR tube, and trottlebody body, and still having poor acceleration, and performance, I was down to either fuel pump, or catalytic converters. I found a muffler shop that would test the pressure fore and aft converter. Passenger side had 1/4# restriction, riverside had 10# restriction!!!! This is the side I had the blown head gasket in December. I guess it just took a while to fAil, but never got a code other than PO300.
So same muffler shop got me out the door 250.00 with an aftermarket cat!
Truck is running great again, like the day I bought it!!!
One of my pet peeves is someone having a problem, posting said problem, discussing said problem, and then never posting solution, or if it ever even got fixed. So now, I won't tick myself off!

Sluggish, PO300, poor performance, poor acceleration, chugging, gurgle