Looking for a nice performance cam with a choppy idle and street power for my 2004 CCSB Z71. Current mods include a BBP Traditional tune, Vette servo, 3.73 Gears -(going to change to 4.56 ring and pinion), a K&N 77 FIPK, a cat-back Flowmaster dual in and out exhaust system, a 6 inch lift with 20X12 Moto 962's with 33X12.50 tires. I don't tow anything, or go off-roading, but going up a slight decline, I can feel the weight of the lift and wheels/tires making it downshift and struggle a bit. I like what "11MPG" recommended by installing a 216/222, 111 LSA, 222/216 lift. I wonder if it will be okay to drive with this before tuning it? What symptoms will likely occur after the cam install? I'll be getting LS6 springs. Do I need new pushrods? I currently have 127K miles on the stock 5.3L. The engine will be also getting a set of LT's with an off road Y-pipe possibly Pacesetter, Texas speed LT's, or Speed Engineering LT's. I'd like a nice noticeable choppy idle, good throttle response, and power from 1500-5500 RPM's. I'll be getting the auto-cal from BBP so Justin can make the tuning changes.