rossmacd - Welcome to the site!
A 67 Fastback, awesome car! My first was a 67 coupe, and am stilla Mustang guy at heart.
Wondering about your engine. Since a 4.6 didn't come out until 1991, did you do the swap yourself? What was in it originally? From what I remember about Ford engines, the engine should have bolted up to the existing tranny, did you swap that too?
Good luck with your CarPc project, excellent when you marry todays technology with an old muscle car! Would love to see some before/after pics, and pics of the car of course!