On Tom Wood's website
, he says "Unless you plan on beating the vehicle really hard, we believe the 1310 series front drive shaft would serve most people well. Likewise for the rear drive shaft.". I've heard people recommend the 1350's for tires bigger than 35", but you'll want to upgrade your axle shafts as well. I would ask any questions directly to Tom Wood, and I would take the measurement they show on Tom Wood's website to get the best fit, and order directly from them (cheaper). That's my plan when I'm ready for driveshafts.