the information andy is giving is the most accurate in the thread.

doing the engine swap in your civic can be done easily. they are very easy cars to work on.

look at a d series swap if you want to retain the automatic setup. if you are willing to convert over to manual. your choice of motors will expand.

if you do get a d series. i recommend you take a part the motor, and put in new seals and rings. just to freshen up the motor, just doing that really helps the motor out.