I'm getting ready to take on my B60T project!  We think it might be a 1963, but I'm going to attempt to get more information via the Mack Museum using the serial number.  Does anyone know if that is possible right now?  Also wondering about recommended sites and sources for parts.  We've got a good "shop family" with competent and experienced mechanics and fabricators - but this will be our very first Mack project.  The frame is in great shape and the body is surprisingly sound.  Fingers crossed