Schumaker vs TTI Headers

I have TTI's 440-2 on my 67 Barracuda 496 440. I am not a mechanic at all so take this with a grain of salt. It took me 10 hours to get the headers on the car. I will admit the car had already been painted when doing this so it took time not to scratch everything up. They are on and hopefully will not come off for a very long time. I already have it set in my mind that it will be at least 1 plus hours for spark plug changes. If I could do this over again knowing now what I know I would have just put a turbo LS in it and be done with it....