i tried porting and polishing my own TBI...turns out i grinded the edge of the throttle plate too coarsely and now my engine light is on because it idles at too high of an rpm. i tried locating a TBI off a 5.3 at a junkyard to get that throttle plate but didnt happen. decided i might as well just buy a performance one online. the one im looking at is 85mm...would that cause any problems with my CAI fitting? pretty sure stock is 80mm. anyways it comes with a spacer too and i know for the money they arent worth it, but it comes anyways so should i use it?? heres the one im looking at http://www.summitracing.com/parts/PFS-69726/