Ever gotten money back from a machine shop?

BTW, bearings and gaskets do not a rebuild make. Most guys think this **** is easy. And cheap. If it was, everybody would be doing it. Tooling is a bank breaker, especially after spending 50k on a machine. You'll have another 20k in tooling, minimum.

Getting a line hone correct is not as easy as it looks. Neither is getting a bore straight and round, with the correct surface. A simple valve job is much more complicated than it looks. You can make or break an combination with the wrong valve job.