See my previous post. This stems from the broken oil pickup thread. Read it and see if you want to spend $350 to protect your V8+ investment.
It's not an upgrade as much as it is insurance against brazing failure that is documented to have happened to the ej257 engines. The 207 v8+ uses the same part number.
KillerB thinks that an accident can be a factor further pushing that brazing towards cracking.
The oil pan has nothing to do with this and you can keep it....
Also, AZ, diversify a little:
Join this conversation about rear differentials
Read about 6 speed swaps
Read the oil pickup failure thread
BTW, I went through this a few pages back. I think that the vendors want you to make hybrid axles for the rear, but read about hybrid axles in the differential thread.
There are people in the transmission forum that do swaps very often and have answers.