I'll take your word for that and avoid them.
Last one I bought was a Mr Gasket. It was typical steel fuel line with chrome plating but nothing to write home about.
The flares weren't finished well and of course it was made you know where.
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Comapre that to this used late 80s Holley non-chromed.
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My suggestion for the OP was not to have a any soft line between the two bowls. Not braided, not anything. Less chance of leaks.