Lower Control Arm End Nut Replacement

[TXScooter]

I am in need of the genius minds out there. I have been replacing the front suspension on my 64 C10 SWB and ran into a problem after I had it all together. When I started greasing everything, I found that one of the end nuts on the lower control arm was cracked on the “flats” (grease was squirting out from the flats). So, I need to replace it. I was hoping that someone out there would let me know if it is possible to replace the end nut without having to remove the entire control arm (undoing everything I just did).

My current idea is to place a pole jack under the control arm just for support. Remove the cracked end nut. Use the pole jack to center the shaft and then replace the end nut. Crazy?