Zinc plate will no way ever last aslong or be as strong as stainless, Infact I dare say they would corrode after time
The overbraid is not for show its to keep the lines firm I was told by the guy at HEL
Where I work we use zink nickle plate and its used on cheap valves. The better valves are always stainless steel, 316, F51 etc
I wouldn't say no to having them on the car but I'd still
Rather have the stainless versions