Ummh, I think that FoMoCo made a 2.0 that was the same as the 2.3 Lima... in 1985(?) they used EFI in Calif, and a carb'd fuel systems elsewhere, and some were 2.0 liters. Same block, but the bore was smaller. THe 2.5 has a longer stroke than the 2.3, but the same bore.
There was a 2.0 ohc used in Pintos and Capris in 1971-197? made in Germany and imprted. Similar to the 2.3, which came out in 1974 models, but no parts interchange.
tom