yah, i have a 2001 Black(and Pewter) rcsb stepside(01Thunder), these are my current mods......

2001 Chevrolet Silverado Stepside, 294ci (4.8L)
4L60E Automatic Transmission,
3.42 Gear, with open differential.
Ls1-Edit
ls1 fans
Hughes 2500 stall torque converter
B&M Shift Kit, w/ Billit Servo
Edelbrock Headers
w/ true dual 2-1/2" exuast,
w/ x-pipe, and 2 chamber Flows
285-60-16 Goodyear Eagle GTII
Ram Air, K&N Air Filter
w/ True Flow air intake
Comp Cams 1.85 ratio Rocker Arms
Bocsh Platinum 4 spark plugs
White Face Guages
w/ Auto Meter guage pods

before EDIT and the LS1FANS quickest time recorded at HRP was a 15.44 @ 89.55 mph, 60' - 2.347, 1/8 - 10.012
no times yet with edit and fans. eaton posi sitting in garage waitng to be installed(just came in the mail today )
as soon as i figure out how to post pics i will