Hello. Does anyone have a definitive way of identifying a 3 core Series III radiator versus a 4 core radiator? Due to an oil cooler, I can't see through the radiator as mounted. The LR came with a 2.25D although now it's running a 2.5D. It probably came with a 4 core but it could easily be a 3 core... I just can't tell outwardly which is which. I assume the tanks may be the give away...? Thanks for any info.