Sorry I don't know about those old automatics but I know those sixes had the intake manifold cast as part of the cylinder head. This may have been cheaper for Ford but it was a terrible design because the manifold would not flow adequately above 3k RPM. Back in the day I had a 1965 Mustang with the 200 six and 3-speed manual, great handling car and super reliable. The engine had mechanical lifters, I think factory builds had hydraulics so this engine may have been rebuilt. Not sure. I am sure it needed valve adjustments every 6k-8k miles which was inconvenient but not a big deal. It was pretty spirited for a six cyl. Still liked the Gremlin better LOL.