lol you want them to be from mexico the cananda ones suck, the ones made in mexico from 03-05 had special 5.3's they were doing new test or somethingif they have 5.3's my moms suburban would leave a posi burnout to 3rd gear lol my buddy has one from mexico and he did a bunch of research on it, and it was like 20-30 more horspower
why not just run headers anyway? i dont know how it is in cali but for me its just a sticker, nobody even has too look at my truck, i know several people that would just give me the sticker, thats why im fixing to take my cats off if wheatley would ever message me back i could get a tune lol
you gonna need more money then that, ive gotta spend over 8k on my sts build (4k invested already), gonna be putting out 10 psi on a stock block for now, should be around mid 12's, you might not need as much boost since you have some motor work