What are the diagonal chassis measurements for a 2007 toyota hilux

You will get these from a toyota dealer from their workshop cd manual. However if you want to check the chassis for bends , the dimensions do not need to be known
place the vehicle over a flat floor and using a plumb bob on a sting line drop points onto the floor and mark the position on the floor . Use the same points on each side of the chassis
get as many marks on the floor as possible and put on the floor next to the mark where they came from on the chassis (ie rear spring hanger, foot step bracket , tank bracket etc)
move the vehicle out of the way and with a tape measure measure the diagonals of like points. Write the dimension on the floor on that diagonal. When finished the variations of like diagonals should be no more than 3mm max. The diagonal with the largest variation will indicate exactly where the chassis needs straightening