Well i have glasspacks on the 65, as you know...and it is practically no different than having straight pipes. If I were you I would just get 2 cutouts and then do what Rick said. Thats the easiest, eliminates all the extra hangers and pipes.
1997 Cobra Convertible. 5-speed.
1965 Stang 289 V8
1995 V6 Auto.-Traded in on Cobra.
1984 2.8L V6 Auto Firebird, new everything.
Currently Enrolled in Second Year of Automotive Technical School.