I just ordered a single Torrington bearing with a .750" inside diameter, a 1" OD, and 1" wide. (J-1216) I'm going to see if I can drill and ream a stovebolt rocker arm for that bearing without severely weakening the rocker. If so, grinding and polishing the shaft down to a 3/4" OD would allow the original rockers to be rollerized.That's about a 1MM reduction in shaft diameter. (.040") I'm using a follower rest on the lathe, across from the grinder stone to minimize shaft flex, sort of like using a steady rest while regrinding a crankshaft journal.
Jerry

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