Has anybody done this swap? If so what oilpan did you use for crossmember clearance and ground clearence

 

If you are swapping a LM7 into a LS1 car just use the LS1 parts because the LM7 is just a iron block LS motor. It is a direct fit. All non-LS1 4th gens would require a lot of work as they have different Kmemebrs (frame) and motor mount. We can get into details on that but no need until you tell use what you are working on.