Just be very careful of coast high. I'm currently not very happy with the 347 kit I recieved and am working on getting them to fix it. They did not seem to interested in talking to me about what exactly I was looking for when building the motor (should have been first indication) then they did not ship all my parts. The ones they did ship took weeks to get here and I had to call 4 times asking about it before they finally pulled it off the shelf (4 weeks after order was placed) to start working on it. If you are really interested in someone who will take pride in their work and seem to really know what they are doing talk to JUSTNLX (moderator) he has some good contacts at Scat.
You can view this thread in the 5.0 forum if you would like to see some pics of my CHP 347 kit and tell me what you think about their work on the heads Stage 3 Canfields (supposed) and the crank.
http://allfordmustangs.com/forums/sh...=&threadid=218
If I cannot resolve my issue with CHP then I will be returning the kit for a SCAT one instead myself. Just wish I had went that way first time around.