Picking through the issues on it now. The mid pipe is leaking at the collector, so we need to get that secured. At idle the truck is 10.0 a/f, but if you rev it to 2K it will hold 14.7 and run great. The passenger side header tubes are 360 degrees on the temp gun, while the driver side is only 150 degrees. That lead me to believe that after the lifter pump up it is holding the valves open and not allowing it to build cylinder pressure and heat. I'm measuring preload and checking valvetrain geometry today and going from there.
If that doesn't fix the issue, I'll put the stock heads back on it late in the week. If that fixes it, I think someone owes Jim some money. lol