[enio45]

The hole for the 68 Camaro rear bumper bracket is a 1 inch hole..

Here are pics of the bracket and the grommet. Grommet protects the license lamp wire going to the harness from the edge of the bracket. That corvette ref # from ZIP corvette looks to be the same #5919057 but i dont see any grommet dimensions.

I need order one for my 68