you have a nice truck lose the tb spacer and i would go back to stock maf. if you want a quick dd, lt's, 3000 stall, shift kit, good tune. your truck is light. i envy you. anything else can be compisated in spray and sticky tires/caltracs.
forgot about the cam.. get a 220/220 on 112 or 114... you'll like it. it's like a standard.