Im needing a couple injectors that are going bad, so i was thinking about going ahead and upgrading all of them, but got to thinking would that be a bad idea? Im running stocks now, should i go back stock or would it be better to go ahead and go a little bigger, what do you think, and if so what size? Truck is a 2000 silvy 5.3, nelson tune, coldair, stock motor other than that, but do plan on headers and cam in a few months