USDM SOHC to DOHC RS

Hey guys,

So I've got two 1999/2000 SOHC RS Engines, harnesses and other parts and just picked up a 1998 RS with the DOHC. What I'm curious about is can I swap the SOHC into the DOHC harness and ECU, or would I need to swap the harness and ECU also? Tried searching and couldnt find anything about this specific question.

Thanks in advance.