I have an 03 Sierra RCSB 5.3l andthe cheapest I could find 60lb injectors for was about $450. I can pick up some LS9 injectors for alot less and have read that some have used them on our trucks with success. I'd like to know for sure what all I need to make the LS9 injector work in our trucks. I have read about needing spacers and I'm assuming I need connecter adapters as well. Can someone verify this for me.

Wire Adapters & Harnesses - Height Adapter - Fuel Injector Connection