351w

Unfortunately the engine in there now is a 4 cyl. And the mustang is the 3.8, so neither would be a drop in fit. I got the ranger for basically free, and it gets driven daily with the current engine and 5 speed manual transmission. But has 240,000 miles on it, so eventually it is going to give up. I also have a 4 cylinder perkins diesel that I picked up for $100 that was out of an '84 ranger. That may go into a little rock crawler project. But that's another day.
Check out American Muscle ,UPI ,or 94 95 Mustangs ,for wrecking yards.
You SCORED.....on the short block. Heads are weak ,look for aftermarket ...