Jennifer:
Checked my manuals and the quickest way to tell size on the Pinto (Lima) engine is by the oil filler cap. On the 2.0 L it’s at the front of the engine, on the 2.3 L it’s at the back of the valve cover. (closest to the driver). There’s other ways but this is the most obvious.
Sorry I didn’t check these sooner. Hope it helps.
Ringo