cruiseliner64

Mack AC help needed: We have a chance to acquire a very well used Mack AC that served as a log truck. It is not stuck and is fairly complete save for the cab but possibly did not have one. The engine is not stuck and supposedly ran in the 1980's.  It has brass data plates on the seat riser that were not readable.  It has solid rubber tires. How can we tell what rating it is and how heavy it might be?  It looks fairly long. Any wisdom would be greatly appreciated!