392 stroker oiling problems

It sounds like you definetly need a well baffled pan suited to your application if you don't allready have one. I have to say that it sure sounds odd that it spun main bearings before rod bearings unless the clearance on the mains was alot tighter. The rods being farthest from the oil supply usually go first. Did you cleck the clearances when you assembled the engine? Should have had at least .002-.0025 on the mains and .002 on the rods. Looser clearances help keep them from spinning but also require more oil so a hv pump and extra capacity is a good measure.