RB20 wiring harness HELP!!!!

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I've had some problems trying to get a harness for my RB20 but I finally came across a guy with a harness and its even already to go into an s13.

My question however is will a harness from an rb20 that doesn't have rb20 written on the timing cover go on an rb20 that does have rb20 written on the timing cover?

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nobody knows?

[projectRDM]

An RB20 is an RB20. There's different series of the engines and some came with AWD, but the engine is no different wiring wise.

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Alright. Is there any difference in the ECU's besides M/T and A/T?