392 stroker oiling problems

When the block was tubed, what size were the main galleys drilled to? They should be drilled to 9/32" through the tube. And I would make sure that there is no flash left on the inside of the tube causing a restriction. Also, it seems that I saw in an older mopar engine book that they were adding oil lines in the valley for more volume to the mains at higher rpm. The line would run from the back to the front, right side to left side. Anyone else seen that mod? It might help. 2c