hello everybody! I am new here and I am writing in representation of my friend who recently bought '86 Dodge Ram B350 5.9 V8 (photo) and does not speak english (we are located in Europe). His current problem is choosing the right ball joints for his vehicle. Which should he use? There are many available with ratings 3600lbs and 4000lbs for H/D suspensions. I found some sticker on his B350 saying: GVWR 8510 LB GAWR FRONT 3360 LB GAWR REAR 5340 LB This said, I don't see either 3600LB or 4000LB. Thank you for any suggestions and help! Have a nice day. Xaver. P.S.: Oh, the vehicle does not have dual wheels in the rear.