Hope to get a quick response to this. I'm replacing the oil cooler lines on my 92 c1500 5.7. When I pulled the old ones out I didn't pay attention to which line went where. Which port goes to which port radiator to the oil cooler adapter? Or does it matter? Also I'm replacing the gasket for the adapter to the block. I have to gaskets a round one and a square one, which is the right one to use? My old one was was so dry rotted I couldn't tell.