let me ask this my #12 fitting for my vaccum pump is on top of my valve cover over my # 5 intake rocker if i hit the breaks to hard i will pull over 1 1/2 qt of oil out of engine. sound to me like valve covers are filled with oil at the finish line. heads are afr 227 cnc 23* had the oil drain backs opened up bigger. only change on last rebluid that and a bulliet oil pump