I wanted to give an update on this situation. I spoke with Droptopp and he realized he must have misinterpreted our communication and said that nobody actually asked 'who is paying for this' first.
In this situation we sold a long block to a customer and the installation, break-in, use and maintenance is out of our hands and we cannot monitor it. There are a lot of variable that come into play here. The first motor that failed after about 3500 miles and a few years of use was on an Alpha 9 build. It wiped the middle two main bearings out, which is a first for us to see. The only main bearing failures we have seen like this is when you are pushing a lot of torque and high RPM (8800 rpm +), because you have massive bearing loads and also aerated oil (on the stock oiling system). So this was strange to see in the first place.
The second engine we build was a totally different engine block, new crank, etc. 1500 miles later the same failure happens, on a larger turbo kit making more power. I believe this at around 1100whp on a mustang dyno, so again not major stress on a build like this. The same failure is happening again on two different engines, 3 years apart. The type of failure is usually seen with high torque/compromised oiling to the engine. If this was an assembly error/clearance problem the issue would show up very quickly, usually at first start up or within the first 50 mile break in period. Every engine has documented bearing clearances (main/rod) and we have documents on both of the engines. Everything was within spec.
We ship a long block out and then we have no control of how it's used, tuned, maintained, etc. We get back an engine that has bearing damage, besides checking torques and clearances that where set it's almost impossible to determine what caused this failure due to the amount of variables at play. Having said that, this is not a common occurrence hence why I reached out to the customer and we also contacted his builder to see what is possibly going on. Either way we will take care of and help Droptopp. If anyone has any questions please let me know!