With these old used and abused forks start by measuring the hole that the bush goes into for every bush. Of they are woren evenly or not more than .002 egg shaped you can make over sized bushes. Otherwise bore the hole out and sleeve it and line bore back to std. I fit the bushes -.001 to -.0015 and lubricate them with a little locktite so they press in a little easier. Instead of a reamer to line bore the bushes I use a piece of shaft with notches cut with a die grinder and cutoff wheel. Spend the time to fit these as straight and tight as posible. The tighter and straighter the better it will ride. If it's not a restoration I usualy make shafts with threads on both ends and use lock nuts on both ends. It's hardly noticable and allows you to fit the shaft to the bushes. I'm attaching a picture of one with nuts on both ends.