Budget 318 build

Was that an allpar article? I found it and read it that is some good info thanks!! So it said evey .005 milled off the head is 1cc so i could mill .50 and take of 10cc with a 73cc head that would put me back to where i am now with stock 318 heads could i run that setup with factory rockers or would i have to switch to adjustable like it says in the article? Cause lets face it thats more $$$$ lol does anyone know how much the average head milling costs?