Here's Grandpa's truck:
http://www.imcdb.org/vehicle_41949-International-Harvester-M-2-4-1942.html
And the others:
http://www.imcdb.org/movie.php?id=93437

The Land Cruiser is the same kind, and the same colors, but I don't know if it's the same truck:
http://www.imcdb.org/vehicle_3398-Toyota-Land-Cruiser-J50-1968.html
http://www.imcdb.org/vehicle_6064-Toyota-Land-Cruiser-J50-1968.html