I bought an 81 4 speed about 5 months ago and have been spending money fixing what was wrong with it (complete brake job, broken Z bar, replacing leaking heater core, etc) My next project will be getting the front end tightened up, then a new clutch (maybe a dual friction unit) after that I want to put true dual exhaust on it with dual cats to stay legal at the same time I'd like to go with a full legenth header but keep in mind i have to keep all the emissions stuff. It seems that there is some sort of tube going to my cat is that something I am going to have to put a T on? Also what parts am I going to have to buy to put true duals on it? I know i need a dual hump transmission cross member. I am also trying to decide what muffler to put on it. What does everyone suggest?