Ahh, dam. I was thinking about 275 injectors before but was discouraged by process. It seems like it could be tough, especially the back two. And the cheapest shop in town wants 250 labor if I bring them in myself.Intake horns on 3rd gen trucks do make a difference, they have a very restrictive stock intake horns. 2nd gens flow much better. Put your money somewhere else like a small set of injectors. Rv275's will give you about 40hp and maybe 1-2mpg.