H23a3 swapped 3rd gen

I am in the process of building a 3rd gen with a h23a3 swap, I am building this with my dad and he has a great amount of knowledge in the Honda game but not much on the prelude side of things. I am in search of a wiring harness that is compatible with my chassis and my engine. I know that there is probably some complications with this given that the car is OBD0 and the engine is OBD2 I believe. Any help from anyone who has done this swap or something similar would be greatly appreciated.