Carl - Not sure where you found your info on your new lathe, but I came across this scanned original 1933 South Bend Lathes Catalog that may provide some great resource info. Tons of reading and illustrations. Maybe it will help you locate the change gears you seek as well as learn more on the lathe?
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~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
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