Bran3b:
I bought the new Ford Jon Kaase heads directly from Jon. He was very knowledgable and had good prices and service. I used them on a street stroker. I do not have a radical cam and did not have to notch the pistons. I posted the flow numbers a while back.
Flows for New Jon Kaase SCJ Heads
Another good article is from Car Craft.
http://www.carcraft.com/techarticles...html?terms=scj
I really like the fact that they produce the same power with less advance. I think 28 is recommended. This should lessen the chance of detonation.