New to me stroker small block of unknown build origin, on tear down found #6 has a spun rod bearing. It was not from an oiling issue as there was no discoloration or signs of heat.

Noticed very little rod side movement on all journals. The spun bearing rod journal had zero side clearance but the bearing was lapped over itself and material squeezed out the side.

Closer inspection showed all rod bearing outer sides worn down into the copper on the edges.

Crank has fillet rod journals, whoever build the motor used regular P series bearings. Obviously going back with HN bearings and guessing the wrong bearing being used is the likely cause for the spun rod bearing.

Sound right?