Lingenfelter 4 in Stroke Crankshaft Clearance Guide v2.0 - Manual (Page 6)

Step 4
: Once the inside ribs of the oil pan have been ground away, check clearance by
placing the pan on the engine without any gaskets. Make sure that the oil pan sits flush
against the engine block at all mating surfaces. If the pan is sitting flush against the block,
there should not be any “rocking” of the oil pan. If the pan does not sit flush, check for ad-
ditional areas that may need to be ground for clearance.
: With all nuts related to the windage tray and oil pump pickup torqued to proper
specifications, install the gasket and oil pan. Oil pan bolt torque specification is 18 lb-ft.