the b20 vtec im looking at buying is obd2 my 95 coupe EX is obd1 obviously so what all do i need to do for it to work without swapping the insides of distributors out

 

Use your stock ex harness, change your dizzy to obd1 bseries, obd1 injectors and obd1 alternater.

 

so can i jus use my obd1 LS dizzy and my LS alternator an injectors

 

bseries vtec dizzy, my bad

 

will it plug right up to the harness in my car right now on my LS motor

 

if your short on cash and have an obd2 alternator u can always convert it to obd1 by soldering the certain color wires,but u need the plug from the obd2 harness. i dont know the exact color to color chart but thats what i did swapping a obd2 motor in my obd1 civic.
its not hard to do but if your swap came with an obd2 harness u can cut it and convert it.

 

I am working on putting in a B16B into my 93 civic Ex. I am studying the wiring from the D16Z6 and The CTR B16B. It is possible the use the OBD 2a wiring harness but there is some wiring that will need fabrication. I am starting to lean toward using the OBD 1 to OBD 2a conversion harness. There are adapters for the injectors. This is more popular than fabricating your own conversion harness. I want to use the factory ECU because it is set up for my Type R engine performance.