Wanting more hp I have a 79 Chevy Malibu with a ls2 out of a 06 corvette with a xcelerator1 camshaft 2400-2700 stall converter a 4l80 transmission 3:90 Positraction rear end and a holly terminator x max wiring harness with a jegs intake mainfold range from 2200-6800 rpm I added new injectors not the same brand but the same pounds and I?m trying to see do I need to have it returned with putting new injectors and do you have to have it retuned every time you change or add something