The "Truck" Oil Pans we deal with all have provisions for an Engine Oil Cooler on the Drivers side top of the Oil Pan. Below are your choices... The Engine Oil Cooler or the Block Off Plate! We use the block off plate as most application don't "Need" an engine oil cooler.
LS Engine Oil Cooler
This is the "Block" that bolts to the Oil Pan
The Oil Cooler Block & Lines are High & Tight to the block