[V12|V12]

One quick note about the chevette core: If you look into the fins themselves, you'll notice that at each end there's a little lip , then a lip at the start of another plate... THough this is TIME CONSUMING, I decided to test out the air flow Vs turbulence caused by these "lips," which are HIGHLY dust accumulating! And with about 2hrs on my hands, I took a nice pair of scissors and poked through EACH vent opening and flattened them out and the air flow is MUCH better, dust doesn't get caught on the lips and temps dropped significantly for myself! Here's an MS-Paint of it...

Be VERY careful, as the lips are THIN copper, and I'm not too sure just how thick the flat copper tubes are, so you don't want to end up puncturing one and not having a way to repair it, with out messing up a substantial portion of the core... Good luck!