After years of requests BOP Engineering has finally produced an Oldsmobile polymer composite distributor gear for Oldsmobile V-8s. Whether you are running a steel billet roller cam or a cast flat tappet they are ultimate distributor/oil pump drive gear for the Oldsmobile V-8. This gear is far superior to bronze or melonized distributor gears when using solid or hydraulic roller cams. Do Not confuse these with melonized gears. Melonizing is a surface treatment that will wear off quickly. There is no comparison. Our composite gears have been proven the in both race and street engines for Pontiac and Buick with excellent results over the past 10 years. Fits 307-455 Olds V-8 This will probably be the last distributor gear you will ever buy!
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https://www.bopengineering.com/olds_v8.shtml