They have and they have had their share of failures, too.
I would not buy anyone's crate engine without a total tear down and inspection.
Same with when I get machine work done. I measure and inspect everything. What's the difference? We've all seen failures on this site from the biggest names around. Why on earth someone would skip a necessary step is beyond me. Laziness maybe? I don't get it.
You're only talking about a gasket set to make sure everything is correct. I've seen crate engines have .020 bearings on a .010 crank before. Standard rings on .030 over pistons and so on. Happens all the time, I don't care who it is or how good they "think" their quality control is. The bottom line is, if there's a person in the mix, mistakes can and will happen.
Disassembly and inspection can eliminate any problems before they happen. Stupidity is the only reason I can think of as to why someone would not do it.
