the bolt pattern was used thru 54 I think the wheels got wider as years advance. you also have to check the center hole where it slides over hub as 2 sizes are available with same bolt pattern. your truck likely would have come with 600/650/or 700X20 tires originally may have been upgraded to 750 or 825X20 tires at some point. the wheels would have either a solid lock ring or split 3 piece lock ring wheels. The RH5 Split wheels would have come later but may have been retrofitted so check carefully.
