Yes, the ZC engine would fit... but it is quite an undertaking. According to a couple of people who have done the swap in their 1st-2nd gen Civics, the hardest parts are in the wiring and fuel line plumbing. Consider stuffing a 1st gen Prelude EK1 1800 engine in there, and replacing the old Honda carburetor w/ a Weber. Direct swap, and the car will have decent power.