I just installed the 4l80E and 212/218, 115lsa high lift compcam so I went to the track just to see how it went before the turbo install.
Truck specs are, 03 reg cab long box, LQ9 6.0l with cam and ebay headers into a single 3.5in Duramax exhaust, electric fans and tuned on E85. The truck weighs 4790lbs without the spare and with me in it, I'm about 195lbs, not sure why its so heavy?? 4l80e with stock converter, 3:42 gears with open diff and 265/70 wilderness A/t tires, so launching was really hard not to spin, I just slowly rolled on it and had it wot at 20 mph. I got 3 passes, the two best were almost identical and I had one where it spun for the first 200 ft.
It ran 60ft: 2.3
1/8: 9.45 @ 79.67 mph
1/4: 14.32 @ 101.63 mph

I manually shifted at 6,000 rpm becasue I hadn't got the shifting tuned correctly with the lever in 3rd at the track. The engine does make power up 6200-6300rpm with the shifts corrected now. I never even go into 3rd gear at the track, shifted out of 1st at 60mph and was at 100mph at 6,000 still in 2nd. Kind of like running a powerglide...? I'm thinking the engine is making some decent power for having this cam considering the weight and mph it ran. The cam did not loose any lowend power, feels like it has a bit more, idles like stock and from 4000rpm and up is allot better then stock. If I was staying N/A I would have went bigger but it runs good with this small one.