Yes, pass emissions once, get collectors plates, no more emmissions.
Air pump depends on who does the emissions inspection. Technically yes, all equipment must be on the truck and functional. In reality, very few emissions employees have a clue what is supposed to be under the hood of a 25-30 year old vehicle.
Also, only certain counties have emissions, its not state wide, so it would depend on where you end up living.
"Do not go gentle into that good night,
rage, rage, against the dying of the light" - Dylan Thomas