Got a little more done. Used the original air cleaner from the '71 instead of the other one I have that says "120 HP" on it. I also have the valve cover from the '71's original engine if I need it.
you need any parts for that 200 let me know i have the complete engine out of my 71 and im getting ready to junk it. any parts you need just pay shipping and you can have it.
Found the titles to both of them. The '70 was purchased by us in August 1977, and the '71 was purchased from a woman. Actually has 203,000 miles.
Bought this 302/C4 out of a bumpside truck for $100. Don't know whether it'll go into the wagon or the Maverick yet, but at least that's a little progress. The car's just been sitting like this for the past year or two: