Lisle tools sells a handy looking tapered screw that bites in to the bushing, then you put a grease gun on it to force it out. I think I will get one one day. Could be a little less messy than the grease and hammer, and perhaps quicker.
I have had good luck with the tap, but once you have threads in the bushing remove the tap and use a bolt to jack the bushing out. Or a slide hammer on the bolt.

Grigg


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-