I am pretty sure it it the venerable, reliable Pinto/lima/EAO/OHC/T88/... stroked to 2.5 l. Lots of things were changed on that engine including head (more than once), the first EECIV injection and turbos. After nearly 20 years in new cars, Ford still sells a version of it as an industrial engine. You didn't have a turbo/intercooled SVO did you? Some of those were rated over 200 hp. How difficult was it to change in later versions? The OP seems to be long gone, but I am curious.
Mine was in a 1976 actual PINTO (stallion package). I now remember the experience fondly. I was living in Buffalo for a few weeks. I was too dumb to take out the spark plugs at first, and I thought I was in over my head. I guess I was lucky that I got "... one of the easiest timing belts out there." I certainly did not have the money to have someone else fix it.
I got it buttoned up, checked it with the borrowed timing light and found the timing spot-on. The car would have run until after the body rusted through three or more times.