I suppose I could just use them as is as they are not worn out. For this restoration I have taken the truck down to the frame and am replacing every bushing and bearing as I go since the truck was not running when I got it, so I don't know what was working and what was not. Seems counterintuitive to me to reuse old bushings in this process, but I will have to do what I can. I would hate to get this thing all back together only to find out that these bushings don't really work and then have to tear it down again.
Steel Rubber Products wants $165 each to revulcanize them, so we aren't going to do that. The Chevy's of the 40's part is only the inner sleave, not the rubber part of the bushing, so that only solves part of the issue. I will look into the two-part rubber mix idea. Have to figure out how to be sure the metal sleeve is centered in the bushing case correctly or I might just create a new problem.