Ringland failure : detonation
Bearing failure : improper maintenance or lack of proper lubrication
Eliminate detonation and run an oil that holds up to severe duty and you'll be in good shape.
For pistons, I can't remember if it was Arias but there was a nice design that had the rings recessed instead of flush with the top of the piston. Who's doing the build for you? Usually different builders have preferences for what pistons and clearances to go with.
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