I used a 1994 Escort GT engine. You need to swap the engine mount and accessories from the Capri engine to the Escort engine. The timing belt has to come off for this. Swap all the electrical parts from the Capri to the Escort engine, including injectors, but use the Escort fuel rail. Use the throttle body from an automatic Escort GT (four wire. The plug is different but the signals are the same as the Capri unit). You probably want to swap the clutch slave cylinder for one from an Escort or Protege, as the Capri one won't clear the engine face plate. I used the Capri slave mounted at a cockeyed angle because I'm cheap and lazy. I used an engine set up for an automatic car, so the oil pan included a sealing surface/face plate for the torque converter. This won't clear the subframe. Either find the correct oil pan or whittle it down with a Sawzall (See 'cheap and lazy' above). Drink enough liquor to make this seem like a good idea, go.
Thats about it. The Capri ECU runs it fine. The throttle tip-in was way more aggressive that I expected; I crashed into the trash cans the first time I drove it.