I do a lot of engine rebuilding--and White Performance & Machine Company does the work getting the heads prepared, cleaned up, and just making sure that everything is level and perfectly flat. That way, when I get it, everything fits together and runs the way it should. I like that they work with you on price so, if you've got a certain budget, they will fit your needs to the budget. There have been times when I have $100 that I can invest--and have gotten exactly what I have needed at the price I could afford.