When I changed the bushings on my one ton I jacked up the side I was working on until the tire was free, then set jack stands to hold it. Then removed the wheel and used my floor jack to raise and lower axle to take pressure off the bushings and pins. Mine were worn enough that there was a ridge in the pin that took careful adjusting to get free.
Good luck.
Tim
I am currently digging back in to a 1953 3800 (one ton) with a nine foot bed. I've owned it since 1979, and drove it until 1982 (or so). My wife got me involved in restoring it back in 2002, got the body removed and the frame redone, then things came up. Now I am retired and starting again. If anyone is interested I have photos on Imagur (
https://timwhiteblues.imgur.com/ ). I live way back in the woods in the Ozarks on 40 acres at the end of a 2 1/2 mile private road.
Tim