Both my Haynes and Chilton manuals covering the Fairmont specify that a C3 was used (as well as the C4) with the 200. I've pulled a C3 out of a 200-equipped Fairmont before. Like Fairmont Dream said, the way the transmission bolts to the bellhousing is a little different than the C4, the pan shape is different, and the output shaft uses the same small-sized driveshaft yoke as the Fordomatic. The C4 uses a larger output shaft.