B18c into my EF civic HELP????

I got a first gen b16 in my 89 civic right now. I going to drop b18c, but i still want to run OBD-0 on it. Do I need to add any new sensors or wiring for the swap or have to do anything else, and can I still use my b16a distributer on the b18c? Does the b18c have any clearance problems from either hanging lower or higher than the b16?