Recently purchased 84 3/4 ton big block 2WD great shape. I noticed this truck has an oil cooler, was this a factory item? Just looking at it and it's routing it looks very OEM. In addition, I've never seen a SBC or BBC with this size of oil filter. We all know the general size of your standard V8 oil filter and this one is the same width or circumference but it's very long...I would say a solid 8" if not a little more. What's that all about? I know, the simple answer is, "well dude, you have a big oil filter, that's it." I just find it interesting that I've never seen this before.