My sack of lemons....
I can send my 6.1 heads to MM and they will cnc them for $700. 360cfm at .600 lift is plenty for me and after I buy springs and retainers I may have $1200 total in my heads. I already have new valves. If I was starting with nothing the Thiteks would be a bargain. Maybe after my build is up and running later on I can step up to Thiteks but I'm not gonna put things on hold until I can afford them. And Eagles are good heads but are not better than a 6.1, I don't know where people get that info.