Well based on the color of the crank it did not have any oil going to the rods journals. Did you have an oil cooler installed or a remoteoil filter put on incorrectly?

lets see a pic of the heads.
the nice straight line of the cleaned portion on the piston,,thats the combustion chamber.rods bent after the crank smashed them out the block.bearings when the go that bad,let the piston smash the cylinder head.seen it many times.just need to see why the journls lost oil pressure.

Read post #61. Do you see any marks on the piston where it smashed into the head? No indentations or marks at all. Detonation causes the oil film to be hammered out of the rod bearing surface. That's why you lose the bottom end. Oil pressure wasn't lost until the bearings failed.

yes I do,pistons 3,5 and 6.

I also think you had oiling issues, the crank is blue from lack of lube, now either it spun a bearing and you kept running( not that hard to do as sometimes don't notice much) ran low on oil starved it, or their was fuel in the oil and diluted it, does not take much and will KILL it in a very short time...carb ever flood ??

Looking at the fact that it has the small automotive type oil pan installed and was likely not properly marinized, I have to also wonder if the 11 lb oil bypass valve was being run in it, which very likely resulted in hot dirty oil being routed to the bearings.

I had a friend that had a catastrophic engine failure due to 11 lb spring in a ZZ502. It took out bearing in the first few hours of hard running. But this engine had almost 200hrs on it. I agree the oil pan might not be optimal, but for 199hrs it was acceptable.

Rookie, I'm with you on the oil pan probably not being the issue here. I ran the same pan on a warmed over 454 for years without issues. However, it may have been possible that the bearings were able to hang in there for the 200 hours if he was changing his oil regularly and keeping it just fresh enough to make it to the next change. Then he comes to this season with some marginal bearings and a tank of bad gas that starts some detonation - might have been just enough to push it over the edge.

We can play post mortem all day, and we still might not ever find the smoking gun in this catastrophe. All he can do is try to build it better next time and correct the issues that were wrong with this one.

So where are all the extremely opinionated oil brand loyalists ? You would think with the answers on 'What type of oil ' threads, that there would be some of those voicing opnions here.

Goes to show you that.........LOL...

When a motor detonates it cooks the oil. If he had a stock cooler and oil that doesn't take heat very well it all would play a part in it.