Most likely it’s a 2.3 Liter. The web sites for the Pinto and Mustang II gang will give you some guidance to make sure.
Once you’re sure, check Amazon for a manual. (I prefer Haynes manuals, much more detailed, IMO)
Also check out sites listed under the search for 2.3 Liter Ford such as Racer Walsh and Esslinger, for aftermarket performance mods if you’re interested in such things. These engines are used even now for sprint and some drag boat racers, so parts are available from basic to upgrades.