Well I just spent one full day trying to get my buddies jdm GSR climate control to work on his R. We ended up taking the entire dash off and we do have all three AC components including the harness for the install, the thing is we got the auto Ac to work but we couldn't transfer the motor from the jdm auto AC to his usdm AC unit, so all in all there is a lot of "fabrication" to make it work and to be honest he finally realized that it was more of a pain in the ass, and it was.
You can try to get it to work, I have yet to do it on EF's. I bought one for my EG and I never ended up putting it in. Just make sure you get the correct motor for the auto AC.
Milan