I'll be making a trip to the junkyard soon. I've been on the hunt for a Dana 30/35 set with at least 3.73 gearing. Is there a quick way to pick out TJ axles from a pile? I know how to spot HP vs LP Dana 30 but are there other tricks? My dad might visit another yard, is there an easy way to make sure he doesn't get side tracked by JK(or other) axles?