Go to this link and click on frequently asked questions. There is a section about swapping a T5 into an early stang.
Let us know how it goes, I want to do a T5 in my 67
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67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Alum. Heads, C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.
My 351W Fastback