Also, you should only have to drill for the windage tray if you are using the stock location for the dip stick. The windage tray is sandwiched between the block and the
oil pan. That is why two
oil pan gaskets are required to install an Aviad pan. If you use the dip stick hole that goes into the wing of the pan you are way below the windage tray and will have no problems. Hope this helps.