i don't know what wiring harness i need to drop a b18a non v-tec motor into a 87' accord dx. please help if you can.

 

Wow, what wiring harness? Well, the one from the b18a would work perfect with the associated ECU, BUT I don't believe you will have all the sensors and such you will need. This would be CUSTOM (read: big money). It can be done though.

 

have you checked the placeracing page?? since they make the mounts for this swap maybe they have a clue on the wiring.