We use the Diehl accessory case with a geared starter. Can't personally vouch for it yet, but a lot of planes have used it. It has the alternator built in, but if you are going to require a lot of electric power, it might not provide enough charging. The starter works very well.
1600 is quite a small engine for a KR2. There is a time for building and a time for flying, and the time for building has long since expired. See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC See you in Mt. Vernon - 2004 - KR Gathering See our EAA Chapter 242 at http://EAA242.org