Hi Rocket man,
I replaced the bushings on my '47 a few years ago using Pre '68 Dave's method. It worked quite well.
Here's a link:
Bushing ReplacementBTW, it's great to see another Iowa Stovebolter, welcome to the SB! Be sure to stop by the new Heartland Bolters forum in the Side Lot. Where are you located in Iowa? I may have a road trip in the near future........
Let us know if you have any questions and good luck!!