same reason I changed the pan on mine. the camaro pan was about the same height as the cross member when done. also about the same height as the trans pan. really, the pan shouldn't be below the cross member by much or it becomes the low point
it seems like the general consensus on the camaro LS swap sites for your era of front clip donor car that the GM oil pan from the 98-02 LS1 camaro fits the best
GM part numbers 12558762, 12598151, 12628771
https://www.amazon.com/GM-Performanc...ZPGG0XH3M932DS
https://www.rockauto.com/en/catalog/...e,oil+pan,5562
you will likely need most or all of this stuff. some places sell a kit. you may be able to source some used stuff if you look around.
-oil pan
-oil filter
-oil
-brake cleaner or other cleaning solvent
-gasket
-sealer
-oil windage tray
-block off plate unless you can re-use the old one you have. some guys drill that plate and tap it for an oil pressure gauge fitting
-block off plate gasket
-oil pump pick up tube
-O ring for oil pump pick up tube
-dipstick to match the new pan depth
-dipstick tube
-oil level sensor, unless you can re-use the old one
-there is a new fangled oil pump pick up tube plate that allows 2 bolts to be used instead of a single where it bolts to the oil pump. not required but that O ring is a source of leakage on these engines
hope that helps