Quote: it is the oil return holes in block at the four corners of deck surface you are correct they are offset from the head holes about half the hole and much smaller than the head holes from looking at world and kieth black they have corrected this but not indy wondering if I could drill them bigger without causing water jacket problems
That's what I thought,we usually make sure they are clear,put .050 restricters to the rockers and install a 3 quart Accusump.If the issue presist we drill and tap the lower head area about 1/3 the way from the front and back and run two external return lines to the pan on each side of the engine.
