Drivetrain Toploader Into A Mustang I I

I tried a Top loader many moons ago now. It wouldn't work in the II transmission tunnel. I tried cutting clearance in the floor board/tunnel for the linkages and had to remove material for the shifter mechanism. IMO, you're farther ahead locating a decent T5 and modding the car for that. It's been pretty well documented in a few locations as far as what to do and really isn't that hard. Depending on your choices, you can retain the II bell/clutch setup as well whereas I'm pretty sure you won't be able to with the Toploader.