Multi-point FI and Dual point FI

My '91 Honda DX (D15A) has Dual Point FI and I'm looking at a CRX engine on eBay (D15B6) with multi point FI. I believe I can swap this engine in but
will need to switch the ECU and wire harness. Does anyone have any insight on this?
I've glanced over the FAQ and didn't find anything.
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