This block was only 4.350 bore. Just a standard 464.......there also was detonation.....the piston is perfect smooth as new..........the picture does look like it but its just the reflection from the led lights above that makes it look peppered. These were brand new, and finishline did the install, so how much they were stretched to and what lube they used and how many times they were torqued I cant answer. Tom said bearing clearance issue.......which clearly it got hot and ate things hence the burn marks on the crank and rods. Now with my lower quality measurement tools what I checked seemed within a few .000x numbers as what I was told the clearances were set to. And I have a set of mains and 6 rod bearing that look brand new not even worn through the coating minus a few scratches from the trash that passed through at the end of its life. Now could that journal had been clearanced wrong, maybe. But I will going to assume that if any machinist got the other 3 right.....they got the 4th right. Now I had the filter off and apart just 2 passes b4 death and there was no signs of any debris in the filter.......and the 1st pass that day ran within a few thousands of what my weather station predicted.......so again assuming not to much was wrong there. But that pass was 1 of just a few handful of passes that were 1/4 mile and it was going through at almost 7000 rpm. So its seems like to this untrained individual that since I had no sign of bearing material b4 that 1/4 pass, and it pukedthe pass after, that whatever went wrong did on that pass.......and if that bolt stretched on that pass it would cause the bearing clearance issue which over heated the rod causing the major damage. I didn't push the issue with molnar any farther, because even if it was a product failure its not like anyone would step up and say....yep my stuff failed let me fix the damage it caused. Everyone has someone else to blameand I'm stuck on the end paying. So if no one was going to step up why push the issue..........it wouldn't do anything beside make me more disappointed. From my experiences in life often the simplest explanation makes the most sense and possibility......to me that is the damaged happened on that pass from a bolt failure and from there it got hot and broke big time.