1.5 ton & up use a taller bar then the 1/2 to 1 ton trucks.
They are the same width though.
On my one ton I used the larger truck bars because at the time is was all I could find.
If I could find the correct bars/grill when I had the extra cash at the same time I might swap it out.
On the smaller trucks using the taller bars you most likely couldn't tell unless you had a good eye or a tape measure. But the other way around I would bet $$$$ you could see the difference, since the larger truck bars are about a half inch taller & the bars are spaced farther apart..joe