i just got my predator and i feel a great difference but i want to know if i should mess with the shifting and injector slope. if so please tell me what. i know every truck is different but they have to be close to the same, so please tell me what you have done to yours. i have true 3in duals, cold air intake, and tb spacer, i got edelbrock headers that are going on monday. and if there is anything elsei should chnge on there let me know.