Most of the info you will find on here is LSX stuff. Nothing against Gen II but you can do so much more with the later stuff...especially with tunes. If you are concerned with speed only, then ditch the 33s and ride on something with a little less rolling resistance...and a little lighter. Cam would be good (I can't tell you what size) Headers would help as well. If you know someone who can do the engine work (boring) obviously more cubes equals more hp.

Bottom line...HP costs money and they are directly proportional, i.e. more hp means more money. Everyone on here will tell you that.

Good luck!