I am wondering if the sandwich plate fits the 500 will fit the 124I don't understand your first sentence and I disagree with the second. Our 124s have essentially the same Oil cooler as the 2.0 Alfa Giulia. It has plenty of capability. That said, I am sure the Forge unit could be adapted to the 124, so if you think it's better, give it a try and let us know.
Greg, If you do make that upgraded radiator I'd like to get on the list for it. Please let me know if you decide to.Have you measure the temps in and out? I'm not sure the radiator is your issue. I do have quite a few new things coming for the 124, and if I do decide to include the upgraded radiator, that's going to be in very limited numbers, like maybe a total of one production run of ten pieces. As for the oil cooler, the stock one is just fine.