Not A T5.... Must be a Toploader? Thanks for the welcome.
Way, way back when I was in college, and close friend whose family ran a somewhat large and prosperous body shop and state affiliated holding yard, storing totaled cars for insurance companies. He and his compadres, put together some strong cars, none of which I could afford to make my own. They took a wrecked 69 Mach 1, and he put a 427 side oiler, medium riser engine, with the ole Toploader and a 9" with 391 rear. I see that car all the time in my head, it truly ran like a bat outta hell. Probably why a shaker 69 Mach 1 in dk green (forgot the code or name) is my favorite Mustang. Got the 71 now, so I will hopefully make something great out of this too.