It takes a LOT of power to get low 11s in trucks like ours, even if you could shift FAST I dont think the 5 and 6speed trannys would handle the power.
I know a guy with an auto truck, dyno'd about 730hp on the bottle and runs 11.80s pretty consistant on a good track. just a reference for ya....
__________________
2000 QCSB, built auto, P7100, 131 dvs, 4gsk, .084 lines and tubes, 7 x .014s, 22*s, maxspool 2.5 cam, 110# valve springs, 125ft lb head bolts, 66/74/.9
ohiocoalrollers.com