Fenderwell headers for a 440 69 A body Cuda

I have tried reading about fenderwell headers installation issues because i love the look but i am wondering how to finish the exhaust for street driving in a legal way because most i have seen or read about is for racing only with no pipes or mufflers. Will i have to fab them up in a muffler shop or can i buy a universal pipe system? I own and can weld. I am not brand loyal and money is not a problem. Stainless or coated is my preferred choice of headers. Also of note, i ordered the Tremec elite TKX 5 speed kit if that makes a difference or not. Also ordered the stage 3 US car tool kit to stiffen things up. I received my PST 1.03 torsion bars and tubular upper a arms and all new energy suspension bushings etc so body sag is not a issue. I also wish to install 26x7.5-15 M/T sportsman tires with 15x7x5 rims with a 4 inch back spacing. Too many Chevy's in my life to know better about "A" body can and can not do's.