My present ride isn't Ford powered, it's a Model A with a 4-banger Mercruiser/4-speed, but I like Ford inlines and have had several since '56. I've had flathead sixes, several 200 and 250 integral- head engines in '60s era Mustangs and vans, and a very nice '67 240 pickup.
One of the most rewarding cars I ever had was a '65 Mustang with a 200 six in it. Hot Rod Magazine did a build up on one and I followed their recommendations with the three single barrel carbs on an Offy adapter, Isky cam, headers and some porting. A buddy's '64 1/2 260 V8 Mustang couldn't catch me, until we got close to 100 mph! I could easily beat him in the quarter mile, though. The power and acceleration that little engine put out was amazing!
