I assume that your request was for the timing gear on the camshaft. For 1935-38 cams that gear was pressed onto the camshaft. Those were fiber gears with a steel center bore. There’s a small notch on the steel center which must align with a comparable notch on the cam. We have original style fiber gears in standard, and a couple oversizes (.003” and .005” I believe). We don’t have the press on gears available in aluminum at this time. Just contact us after the holiday break if you want to order one.