Wow your making this swap more complicated. Get a S13 DOHC engine harness, DOHC ECU, Distributor, and intake manifold /w all sensors. Relocate PS line and color match your dash connectors for sohc and dohc are not same but wire colors are. I just did this swap but mine was a DOHC already so it just a matter of swapping longblock and keeping the rest the same. GL.
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