I am looking for running boards for Green Bean but need to get a bit of knowledge first. I see a lot of used running boards on FB marketplace. Sometimes they know which truck they came from, but most often not. What do I have to measure/know to buy a used set that will fit my truck? I am hoping to have to do nothing more than drill a couple of holes - don't want to have to weld or cut anything. My truck is extended cab, not the 4 door version.