Not sure the reason for your need to change but,at Nashbar.com they have an adaptor that allows you to use modern threadless headsets with the threaded quill design the cost is under $15 part #NS-TSA.Measure you current quill to order the correct size,note that the one inch quill is actually closer to 7/8".If your quill measures one inch order the 1 1/8" size.This adapter allows you to use the larger variety of headsetsstems and bars that clamp on to the steerer tube while reusing your old fork.
Mac
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