[SilverDropTop]

What CAI do you have? I would say basic tune up (plugs, wires, pcv, fuel filter) install LS6 intake, get Shaner S2 or S3 ported DBW TB, Tune, and depending if you have it or not a Vararam. If you can keep your foot out of it, you should easily gain a few mpg and hp. I'm a big fan of the ac delco iridiums (41-110 which replaced the 41-985) on basically stock motors and the MSD wires...I ohm tested them against my granatelli wires on my truck and they were pretty close (I think a magazine did a test on them as well and the MSD's came in second with the granatelli's taking the top spot). For the $40-$60 you can get them for on ebay, they're hard to beat. If you have the extra $$ some ported MAF ends or a gm 85mm maf are nice too (you'll need a tune to really benefit). Just my $.02