I thought the $800 was a little steep as well. Check out these links
http://sdsefi.com/techheader.htm http://www.well.com/user/mosk/ the first one is one I found on a header build and the second is a guy who has devoted a lot of his time to 22rte motor info and helped me a lot in my turbo build. I have seen a few manifolds on ebay from time time as well.