Droppedrx7

My 93 has a Jdm harness in it, it's retarded, never worked, no one could ever figure out exactly what wires to swap etc etc. going full standalone, most likely a wire in type. Not a plug and play, I want the Jdm harness gone, I don't want to buy a new Mazda harness, and I don't want a brittle POS harness from a parts car. Leaves me with almost no other options besides a wire in ecu like megasquirt or microtech. OR a Rywire harness with power fc? I don't even know if the Rywire harness will pair up to the PnP apexi powerfc. What should I do here? I'm running out of time. Thanks. Is there anyone else that makes harnesses for fd3s?