I like the white firewall, wheels and grille idea. Grille right now looks very monochromatic. I think black wheels will take away from the look and make the wheels, hubs and tired look like black blobs. White wheels with the black hubs more define the wide five. I like the wheel trim rings for a good contrast. You could maybe break up the grille/shell with some contrasting white or chrome trim around the insert. Or you could do all the contrasting parts outside to match your gauge face color. Depends on how many colors you want to deal with. Nice truck.