I could measure mine up, I'll get back to you on that tonite. I do beleive you would require the ones from a 66-77 for a YJ. But if you can spend the cash, any Dana 44 from the years 77-79 but for the 9" any one from an F150 can be shortened to fit and its not really overly expensive. Shortening and race axles can be had for about 600.