97STANG

I just recently bought a book some of you guys may have already have read, it is "How to build max performance 4.6 liter engines". I saw it in Hot Rod magazine, so I decided to buy it. Any ways, I was reading about all the differant types of cylinder heads. And they say that the 98' SVO heads that were made for the SOHC 4.6 were the best. They flow un believeable well, I cant remember the exact numbers. They said that they would be the best choice for a street/race motor. Does anyone know where I can get my hands on pair of them???? Thanks.