Need Help With ECU for a JDM D15b non vtec engine

[92VXHatchguy]

Here's my situation. I picked up a 92 Civic CX hatch with the JDM D15b motor installed. My understanding is that the stock ECU is a p05. I've called different places such as JDM engine importers and they can't tell me if it's a p06 that's needed. This car is a 5 speed and the car was taken here to the local state ref here in Los Angeles, CA. Car passes all emissions with no problems, but the timing is off.

He recommended to either adjust the pulley or change the ecu. Which is the right thing to do?