Wouldn't it make sense for them to make an adaptor plug that would plug into the engine harness of the ZC, and then into the factory harness of the SI? i think it would sell decently....maybe something somebody can buy parts from honda and some wire, then sell on eBay (or to me)

 

If I'm not mistaken, I think the only difference between the Si and ZC wire harness is one of the distributer plugs. I knwo you just have to cut two wires off it and run it to the front cam.