best fitting headers 65 barracuda

"TTI headers have larger tubes and collectors, they are also less money".............Tubes are larger, however I've heard that they require a special starter, BIG$$$$, and you hack saw/grind boss's off the bell housing for clearance; so it comes around to be about the same$$$, time and effort.

Headers and Early "A's" are problematic from the get-go; never been easy and probably never will be.

Good luck with what ever you do; show us pictures when done.