Center hole is for hand crank guide and the factory accessory grille guard. Also the front bumper on a GMC is much heftier than the Chevy bumper, but bolts right on, was lucky to find this one.
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4647&Zeke.jpg (71.35 KB, 76 downloads)

Last edited by JiMerit Boltr#43; 11/17/2021 4:50 PM.
It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed