I rebushed the driver side bell crank pivot on my '87 P 30 chassis. Bought the bushings from the Chevy dealer for about $13 each. Book is wrong as it says one per side, it takes 2 per side. I used my Dremel tool to almost cut thru the old bushing, then peeled them out with a small chisel, screwdrivwer will work also. Drove them back in and honed them to fit with a brake wheel cylinder hone and WD40.
I also added a thin rubber o-ring to the top and bottom of the shaft so it takes more pressure to get the grease to run out. hopefully this will cause the grease to go around the shaft better. I'm still going to grease these twice, once with the steering all the way to the left, then all the way to the right.
Made a big difference in how the rig steers.
Part number for the bushings is 00266316.