Look at the plate under the hood on the firewall, it will say in code what the stock gears are, there was an option with 4.88s with the 31" tire package and that could be yours, but it will still say on the ID plate. I think the info page is under Roger Browns website on those plates...
gotta link for dudes webpage
![I Dunno... :dunno:](https://board.marlincrawler.com/Smileys/marlin/dunno.gif)