Can I use "un-graded" bolts on my U-joint straps? My 14B s/f has these little U-bolt strap bolts on the yoke. They are 5/16-24 and 3/4" long. They are "reverse Torx" type, which I find really annoying. I want to replace them with a bolt with a different head. I would hate to be unable to change the U-joint on the trail or roadside because of these crappy bolts. The only Grade 8 bolts I can find have hex heads that are too big. The only thing I can find that fits are standard allen head bolts. I worry about the strength, but the construction of the stock bolts seems pretty bad since the threads are a little worn and the caps are rounded off. How much torque is actually on these things? Anybody put in cheap bolts and have them break? The ones for sale in Auto parts stores are Grade 5, I think.