ok.. check the front main seal, oil pan for damage also if the system had a oil cooler it could have riped off line or busted the cooler.. need to degrease and inspect for damage .. if the engine is still above the add oil line on the stick and safe oil level to crank .. you can start the engine while some one looks for brief moment to see if the oil leaks out and you then can see where it is coming from. then you will know where repairs are needed. if the exhaust is bet more that 50% close do NOT start engine .. it it is just been rubbed flat and still has room for the exhaust to flow it should be safe to crank.