I have the valve job corrected. That means, they are taken apart, everything washed (amazing what stays in them from Edelbrock), the guides measured and honed if needed (usually at least 1 in each head..), the springs are checked for tension (you dont buy springs based on lift..it's installed height, coil bind, and tension you really need to concern yourself with. Because they say "up to .600 lift" doesnt mean much when the typical fast rate cams today use higher seat and open pressure than the Edelbrock furnished ones can deliver), the seats are checked for roundness(at least 2-3 per head are out, some WAY out), touched up on the Serdi with a 5 angle cutter, and it all goes back together. The cost is $200 excluding new springs and retainers if needed. That's the result of having fresh engines torn down for various reasons and finding a sticking valve, or burn marks accross the seats from them not sealing, and finding aluminum shavings inside ports stuck in the assembly lube. If it's any consolation, all heads from the aftermarket have these issues OOTB. Brodix, Edelbrock, TFS, Dart, Indy, you name it. And not just Mopars. When they say "Ready to bolt on" they mean it will physically attach to the block, and it will run when you turn the key. It doesnt mean they are done well, or even that they are "right" for your application. Details like these are what makes good engines great. Some buyers notice things, a few have serious problems..I want to make sure that the customer is happy. I've had too many friends have work done at various shops (some big name ones too)and be disappointed for any number of reasons. Oh, and yes, I've had my share of human errors too..Nobody's perfect...lol. But if I'm going to spend $1300 of mine or more importantly someone elses' money, I'll spend the $200 to get every ounce of performance I can out of them.