Bodyguy,
I assume you are talking about a LCF, Chevrolet didn't make a COE in 1957.
If you just need the Grille Bar, it's the same for all big trucks from 1955 to 1957.
If you need something else I'll need more info on exactly what part if the grill you need and what series truck your working on and what transmission you have, it makes a difference.
Mike B
