Finally got to a scanner that reads it all and puts results in words nearly Californio. AFR/M 02177 AFR/M 02188 pcm may be suspect or clean MAF. Ok, that can't hurt. Nailed it down to (mech and self amazed it runs) max fuel pressure at rail 20psi when running smooth, 10 when running ragged. There is too much gas going back to tank (check valve?) and/or all caused by not enough 'oomph' from pump or plugged filter. Buddy has pristine pumped (didn't know you could)
69 Shelby GT500
, mmmm bebe. He also has made superb birch steering wheel for it and could be coerced into more.
Have read posts by Mike, SavannahBuzz and couple others but can't quite decipher any common point. Did have outside air showing at -21F when +/- 80F. Plan from this point is clean MAF, new filter and test. If NO then get decent pump for assy and dive into tank. Any thoughts or missed stuff greatly appreciated. Thanks, Peace and happy Independence w/e.