hole in my head

I don't think you were taken at all. It was probably a damned powerful engine. I mean damn, they have heart shaped combustion chambers now. lol Milling to raise compression is old school technology. There are different ways to do it. Some say better. But if everything else is done to match up with the milling, such as correct pushrods, milled intake and the like, it's perfectly acceptable. None of us knows whether they soniced checked anything. They may have. I guess what I am trying to say is that different people do things different ways. That doesn't necessarily make one persons way wrong. I would just about promise you that intake has indeed been milled to match. Having milled the heads that much, it about have to be.