Hello, I'm trying to find out the width of a 66 c10 longbed from the edge of the metal flange the bed bolts go into compared to the width from the edge of the two wooden bed boards? I know it says 65" on the original diagram but I wasn't sure where the 65 started and ended. Also was not sure of the width of the wheel wells. Anyone who could share this with me, I would greatly appreciate it. Thanks, Eric Springfield MO