TTI header woes

I have experience with TTI 1 3/4, and the 2 inch primary tube headers into a 73 Scamp and 74 Swinger. I had the same issue with the prop valve with the 1 3/4 in the Scamp. Simply unbolted the valve a "convinced" it to slide back for the needed clearance. No other issues. On the Swinger, the 2 inchers fit almost perfectly. The collector on the pass side was VERY close to the trans pan bump out on the 727. There would have been room to move the tubes and collector over about 3/4 of an inch towards the T bar. TTI states that those headers are not meant for that platform with 727. I called them, not to complain, but rather, give them useful info on my findings. They appreciated it very much. Not sure if changes were made, at least I tried. I can understand some frustration. I get it. BUT, when I spend that money, I'm NOT cutting the header. It WILL fit when I'm done.