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

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
I can’t remember if it has a bolt on bracket on the bottom but I think it doesn’t. I 74/75/76 has a tab built on it to slide into a spot on the radiator support. Kim