I just did mine. Melt the lead. Find the spot welds, drill them out.

See the job here, start at the bottom of the page. http://www.bunchobikes.com/1952suburban18.htm
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1952suburban401.jpg (66.12 KB, 118 downloads)
1952suburban404.jpg (48.01 KB, 118 downloads)
1952suburban406.jpg (57.49 KB, 108 downloads)