Originally Posted by Tab
A good 3/4 rod end has about a 76k radial load rating. But the bigger issue is the shank bending/breaking. Why do want the weakest you could use when you could just get the size that works best and is safest?
Exactly what tab said. i would recommend a 3/4" bore witha 7/8" shank
I think he even offers a greatlakes4x4 discount.
EDIT- this is assuming you are building a tube rig under 4500 lbs and under 450 hp. If this is a 600hp rig on rockwells, you'll need bigger. I just saw you are from TN, and there are some big rock rods down there.