I don't know much about FSJs except waggie axles fit great under my YJ, and I have a bumper that came off a J10 that I'm selling on eBay.
Anyway, heres what I need help with: I don't know what year J10 it came off of, maybe late 70's early 80's(totaly guessing). I listed "should fit J10's, J20's, full size Wagoneers and Cherokees". I don't want to misrepresent this thing, and I know someone is going to ask me "Will it fit my xx year FSJ??". So, anyone know how interchangeable the front bumpers are from year to year?