First post here. Just want to thank everyone for all of the help so far! I have searched high and low for some definitive answers to my question but I could not find anyone else with this issue. So I bought my truck last August and have been fixing things with it on and off since, and one that just popped up is the oil cooler. It is leaking from the front gasket, so I cleaned up around the area and attempted to pull it off. Unfortunately, the flexible fuel lines seem to be in the way, but they truly are not very flexible when connected to either end and will not move much. I would love to just disconnect them, but they don't want to budge. The older lines from the bowl seem to be rusted in the quick connect fittings, as I can visibly see the fittings' springy tabs and the quick connect tool going in and locking but the lines will not come loose with some considerable pulling. My uncle who owned two of these said he thought he remembered having to take the fuel lines loose to do the oil cooler, but wasn't quite sure. However, it seems like no one else online mentions having to do this. Has anyone else had to pull the fuel lines loose or am I just not finding the right angle to get past them? I have the lines loose at the bowl to hopefully give me some more play in the lines but it didn't help much, but it seems more involved to pull the lines out any further and I was hoping to avoid this.