Video of why not to install aftermarket heads right out of the box

Yup, heard it all before. Buy bare heads and expect to build them yourself or hand the parts to the machine shop and have them assemble them. So you can skimp on the heads themselves, as you are going to cut them, polish them, port them, reguide them and grind the valve seats already....Pro-comp to Brodix to Indy, they all have their "this head is junk" thread.