The machine work was impeccable, the quality of parts was top of the line. The price was great, when you consider how much you would spend at your local machine shop to get the same quality machine work done,,, but,,, trying to get ahold of these people is frustrating. I wish they had more people helping out with the phone calls.i have another customer that wants a complete 572 engine but wants to know more about the build. I have called and left several messages weeks ago, still to this day, I have not been able to speak to anybody. Must be nice to be that busy. Great product, not enough people handling inquiries!