I've heard bad things about CHP not standing behind the products they sell. One such instance was with the nice 427W they built for Andy here on the forum. You can read Andy's polite description of his experience with them here:
http://www.cobralads.com/butcher38.html
http://www.cobralads.com/butcher39.html
Andy is a far more patient and understanding person than I
. You can do a search on the corral.net and find a few similar instances. I'm not saying they don't sell a good product, as I've heard lots of stories of guys that have bought motors or shortblocks from them and have been quite happy. Chris is one example. It's just something to consider.
Mike