I do not believe they will, they are different ball joint designs, but I have not measured to confirm and do not know if the parts will interchange for the ball joints.
I just remembered you asked about that, and I forgot to go back and answer about converting from metric to 8x6.5. There are a few ways to accomplish that. The easiest if you have access to a mill and rotator is to redrill the pattern in the unit bearing, brakes all work and the wheels will bolt up. You can also purchase unit bearings that are made that way, there are several vendors for that.