hi .has anyone used computer chip or tuner for are cars if so what were the gains or loss of power.i have 350 cam intake headers rebuilt 2004r .no engine light comes on with these ad ons i know a lot of hp is available hopeing tuner could bring out hp has 7a heads.i also have 300csrt8 with predator tuner witch made huge improvement.any thoughts thanks w/31. I have 1987 front fiberglass nose peice with head lights if any one intrested pm me .