2002 - 2008 are all 3rd Gen trucks
In 2005 there were minor changes, i don't know if the body style was part of that change
I would think that if they changed the hood, the grille would be changed too
I just checked 2004 dodge ram oem grilles
& then
2006 dodge ram oem grilles
checking the production years, it looks like there was a change in 2005
maybe someone else had tried the switch & did it successfully