Not sure I understand. The threaded braces are stock. They came on every single one of my cars, which is 2x '71 Darts, 1x '74 Duster and 1x '74 Dart. I've also seen them on several A-bodies at the wrecking yards. I'm pretty sure the only '67-'76 A-body that didn't come with them was the Barracuda.
The only thing I did to mine was lengthen them so that they push the lower front corner of the wheel opening out so my 275/35/18's didn't interfere. The stock braces are 12" end to end, mine are now 14". Here's the pictures...
From the bottom
View attachment 1715562106
From the top
View attachment 1715562108
at the bumper bracket
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at the fender
View attachment 1715562107
