how safe it is to ride just depends on the qualit of the welding. reinstalling a Viscount BB to use a FG might be hard. you need to find a spindle the correct size for the cranks you wish to use but also the type use in a press in BB. the VO BB may still be best way to go
pics?
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk