The 5 bar grille was standard from '47.2('48) through '53. 1954 was when Chevrolet went to a one piece windshield, but you can get a one piece(bent in the middle) windshield for the '48 - '53 models as seen here .

David Colter
pics * 1954 wrecker * [color:#009900]1948 Chevy 1-Ton[/color]
No act of kindness - no matter how small - is ever wasted ~~ Aesop