Joe, If you look at http://kr-builder.org/CockpitWork/index.html you will see what I have done to provide cabin heat and fresh air. We have a VW engine, so we are going to do it sort of VWish, coming off the exhaust.
There is a time for building and a time for FLYING and the time for building has expired. See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC See you in Mt. Vernon - 2005 - KR Gathering