I am being told that the oil cooler on these are external to the radiator???? He told me the donut between the engine and the filter was the cooler, I told him that ,that was were the oil was picked up from than ran to the radiator was I wrong or any info would be helpful. Thanks

 

I didn't know that any thirdgen F-body came stock with an oil cooler. I remember reading about a corvette oil cooler that sounds like what you describe, though.. From the way it was described, it is a "donut" that goes between the block and filter, and it has coolant lines running to it. Think it may have hooked up to a freeze plug somehow..

 

Alot of the later Z28 motors came with the oil cooler as you describe. Unlike some other cars though, rather than running a pair of oil lines to the radiator, instead they ran coolant lines to the oil. So there are 2 coolant lines that go to the "oil filter adapter" looking thing, to cool the oil as it goes to the filter.