The SPC Database lists 9 tornadoes on March 16, 1965 including a long-track F4. This tornado is listed with a path of 82.7 miles through parts of Grant, Kay Counties in Oklahoma and Sumner, Cowley Counties in Kansas. After digging into the Storm Data entry and Significant Tornadoes by Thomas Grazulis, it would appear this was more than likely not a single path. Read the full summary here.