hiball wrckr

My new old Mack truck, I am going to put on a fifth wheel plate & use it around the yard for now & put some new lights on,etc. I think i know who owned it last but somoene took off the door tag so i need some help identifying it, the engine #s 239GB5320B , The only thing I could find out about this by engine number matching one for sale online is that it appears to be a T675 , any idea what year ? what size starter this uses as i need one, It also has the triplex 15 speed transmission, Thanks