I have a 200ci 6cyl in my Econoline. I believe it is a 1968 engine if I remember correctly. It has the intake "manifold" cast into the head. A few of the bosses with bolt holes cast into the head for the exhaust manifold are broken off. I'm looking for another head to have rebuilt so I can swap them out. The hole in the intake for the carburetor measures 1.75" in diameter. I know some earlier 200's measured 1.5" here. Does anyone know what year Ford switched to the 1.75" carb base opening and what years will interchange with mine? Thanks, JH
^^^ THIS I looked into the small six heavily before deciding on a big six for my project but I can't help you any more than suggesting fordsix. I'm pretty sure you can fit a big six in there though