As per the label on the tin, Starts real easy and smooths out perfectly above 900 RPM, hooked an AUTEL AL329 to it and picked over Live data, Fuel trims all show zero or slightly negative except for STFT13 which for some reason is pegged at 99, not sure if thats an aberration with the scanner or not as it shows bank 1 and bank 2 LT/ST a few places above, and also shows a spot for STFT14 below that which is reading as expected, which is strange since that means im being shown 4 Short trim sections and 2 long trim sections. has a little stumble off the line and when warming up its not not as smooth as it should be, or maybe im too used to my Silverado worktruck...
Spark advance was varying between 18-19 degrees cold, engine was cut before it got warmer than 100 as the truck is immobile in my garage and i dont want to inhale CO2

 

starting to look to my plug wires as a culprit, via incomplete ignition, and some weird readings on downstream O2S, some parts swapping and i should have a definitive answer for this, as i noticed some scorching/burnthrough on the wires from the manifolds, and incomplete combustion seems to be whats happening here to cause the little bit of laziness.