i currently have a d16a9(edm) 89 crx and i am wondering what honda cars i can put this engine into with out any large modifications?

does the 88-89 integra ecu work any better with this engine and is it a direct replacment?

looking for more power on a budget as this is my second car. it has a heavy duty clutch, 4-2-1 maniflod, 2.5 inch piping twin exit exhuast, nismo air filter with a stainless steel induction pipe. any help with this matter will be greatly appriciated