72 Swinger owners, need some help

Im working on assembling my car and have a couple questions. First is the radiator support to K frame brace. I have two different ones but neither fit. Im looking for measurements and possibly a pic of the correct one. Im attaching a pic of the ones I have . The black one is 10" long and 8 3/4" center to center bolt holes. The green one is 9 7/8" long and 8 3/4" center to center bolt holes.Both of these are too long to fit on my car.
Second question is the L bracket that the grill attaches to. What kind of hardware is supposed to go here (see pic). I figured J nut but I cant figure out how it would work in this large hole.

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