From the 1960's, this is an R-330-HC roller camshaft for a 426 hemi. Duration at .050" is 282 degrees on intake and exhaust. Lobe lift is .370", so gross valve lift with stock rockers is .581" intake, .562" exhaust. Lobe separation is 108 degrees. Recommended valve lash is .028" intake, .032" exhaust, at operating temperature. This is ground on a cast steel core, so it wouldn't be copper plated on the barrel. Regards, Chase