I want my 83 thunderbird to have that old muscle car sound and I understand you cant get much out of a V6. I have a high flow cat and 40 flowmaster. Sounds nice now. When idling, sounds like an 8. When i rev it, sounds beautiful. However, when im out on the road, gets a little too high. I dont know if I like it too much. I really dont want to be mistakin as a ricer. Now if I were to put true duals on it. Same as my originial exhuast. High flow to a 40 flowmaster, would it be worth it? Would I gain sound? Would I get a lower rumble? Im just afraid I wont have enough back pressure. Also im afraid of losing sound. What do you all think? Also, should a get a set of headers?