I have a solid roller in the 66 Fastback and the cam manufacturer insisted on a bronze gear. I ran the bronze over several years, and had to replace it every spring as I could see the wear taking place. A few years ago, I switch to a polymer gear. In spite of its amazing lightweight, the polymer gear has so far shown no wear at all.
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66 Fastback Restomod (342 stroker, T5 12.8 @ 112 mph)
85 GT Hatchback
2008 Bullitt
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