Turning sharp all depends on width of the axle and or radius rods where the tires hit at full turn... This is why I build a 54 inch tube axle... If you are starting from scratch, mock up the axle with the wheels and tires you want to use, turn the wheels as far as they will go, now make sure they do not hit either the drag link or the radius rods, by mounting then closer to the frame (not as wide on the axle, or bend the radius rods to clear if already mounted) By the way, there is nothing wrong with 1"X.188 wall DOM tubing for either set of radius rods, ft. or rear... If you think you want or need more strength, weld in an extra bracket, mid way? to the radius rods, but this size (I have found)works great even with a strong Big block that hangs on tight, been there and done that.. :hoist: ride safe