Someone please explain to me why you would put an oil cooler on an LSJ engine. My engineering brain doesn't see the logic. On an old air cooled engine it makes sense.
The LSJ already has an oil heat exchanger stock from Chevy... it exchanges heat with the engine coolant. The engine coolant has a thermostat, and regulates the oil to the correct temperature. Both heating up the oil (cold engine start), and cooling it down. If you are making too much power, and the engine can't keep cool, then add a heat exchanger to the coolant, not the oil. Running cool oil does not lubricate your engine correctly.
You could convert that oil cooler back to a heat exchanger for the intercooler, and keep the intake air temps down.