The drive train/suspension is the same on the Pinto, Bobcat (Mercury) and Mustang II.
Check eBay for a manual…if it’s a 2.3L, then you need 1974 thru 1980 Pinto. The last Mustang II was 1978, the last Bobcat (I think) was 1979.
The 1974 up Mustang II, Pinto and Bobcat wagons were available with a 2.8L V6, the same one that came in the Capri. The last two years of the Mustang II were also available with a 5.0L V8, but they are rare. Most of these cars were either a 2.3L I4 or 2.8L V6.
The 73 and earlier cars had 2.0L and 1.6L engines and European Ford transmissions.