73 340 duster factory overflow bottle mounting bracket

I'm thinking until I find one it.May be not that hard to make one temporary
These are pics of the bottle and bracket u need. Hope u find one. The bracket is totally different than a 74/75/76. Kim

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Are the bottom bolts like welded on stud's 1/4 20?
And how does the top fasten to the bracket.. Is there any?
Way to get any measurements if I was to try and make one... I should.
Be able to just look at the pictures and get an idea of how it's made.... Thanks