Ok.. Bought a cheap focus for my step daughter last night. Does not start so I got it cheap. Is very straight and pretty clean and everything seems to work on the car other than the engine. I am a pretty competent shade tree mechanic. Been wrenching on my own cars for 20 plus years so digging into or replacing the engine doesnt scare me. It cranked but sounded like it was cranking sluggish and when it did fire it sounded pretty bad and died agian. So my question is this. If I end up having to replace this engine, what years are compatible? What bolts right in and goes. Or what short blocks bolt in if It is just a thrown rod or something? I dont mind putting this head on another engine and all the toppings if I need to. Any info would be helpful. This Focus is a 2.0L SE automatic with the base single cam engine in it. Also is there anything else I should check on these such as regular problem areas?