4wd Ranger and Bronco II exactly same far as engine compartment, axles, frame. Wheelbase just little shorter on Bronco II.
I never had any Fox body Ford with 200, so dont know if their rear sump oil pan would have to be modified or not. The 300 I used had rear sump oil pan BUT Ford made sump part in from back couple or three inches. I needed it fully back like the GM straight sixes did so it wouldnt interfer with that hinged front axle 4wd Rangers used. The 300 also little wider than any OEM engine in Ranger so had to modify front axle cross piece to allow for wider oil pan. Also the 300 has oil pump on drivers side right where this axle is so had to notch even further to allow for it. The 200 has the oil pump up front so that wouldnt be problem. Not sure if 200 is short enough to allow use of stock radiator placement or not. The 2.8/2.9L V6 radiator should be big enough for a 200.
What I'm saying is putting a 200 in a Ranger/Bronco should be lot easier than putting in 300, but cant guarantee that. I just havent messed with a 200 since I owned a '71 Bronco many years ago. I probably would have went with a 200 or 250 for my Ranger, but finding one in usable condition without a rebuild not that easy anymore. Can still find 300s usable without rebuild.