I have a 83 512 BBi and it was originally converted by Amerispec. It has the original headers but the exhaust has been converted to what is described as a sport exhaust. Basically the exhaust runs through 4 straight through glass pack type of mufflers. Its loud at idle. I am thinking of converting back to the stock exhaust vs a Tubi. Any thoughts about which one is better vs if switching to an aftermarket exhaust will hurt the value of the car. Thanks in advance.