If you are going to get a Champion grader make sure its Cummins powered you don't want one that has 6/71 Detroit power. The old 740 is a common size.
There is a reason why the 14G Cat series grader popular for one it has the weight to it. Second it has better drive system and runs air brakes no dealing with hydraulic brakes.
The highways dept had a John Deere grader and had a Cat 14G the Cat did a better job everytime. The reason being was the Cat has the weight the tires have good traction and keeps pushing.
The old 740 Champions were good old machines lots of them around but just too old and slow for anything that needs production. The old chain boxes can be a problem and expensive.
So if your looking for a grader get a 14 series Cat machine.