I am going to be picking up a 1980 hj45 diesel rt hand drive- do not know too much about these rigs- wondering what i should look for when i inspect the truck- i will be driving home about 1200 miles so i want to be prepared- any tool box suggestions to bring etc- also are there any good treads out there for diesels - it says the engine had been rebuilt- the rig looks clean but only see photos- thanks in advance-