Got a 360 for an A-body but need an oil pan. I have 2 360 oil pans but does it need the little indent on the one side in the center just ahead of the sump to help clear the steering bar? I see oil pans on Ebay advertised for 71-80 360's are they all the same? I replaced one for a 318 A-body once and it had the indent. Any advice?