I would imagine the diesel one is a sandwich adapter which is fine if you want to add an oil cooler to a stock set up but it will still have a filter that screws on in the same location and probably giving you even less clearance than what is there now.
If you add a remote filter set up you can easily plumb in an oil cooler to that (if needed) I have a 7 qt oil pan with 2 filters in my Monte with a 565 BBC, it takes 10 qts to fill my system and my oil temps stay around my coolant temps all day long so I doubt you would even need a cooler.
If you add a remote filter set up you can easily plumb in an oil cooler to that (if needed) I have a 7 qt oil pan with 2 filters in my Monte with a 565 BBC, it takes 10 qts to fill my system and my oil temps stay around my coolant temps all day long so I doubt you would even need a cooler.