Almost. The only modification you may need is to extend the harness for the plug in order to reach the connector on the Denso alternator.
It may be possible to pull slack out of the harness and have it reach the connector, which is in a different location on the Denso Alternator.
I got mine from Ebay for $85 shipped. Works great. Had it 2 years with no issues.
** Make sure you get HONDA OEM DENSO - used or new. If you are looking at a rebuilt, make sure they rebuilt ALL of the components inside. And I mean ALL of them. some places just replace certain components and call it "rebuilt". But, I will tell you rebuilding a Alternator can cost almost as much as a NEW one.