A game of guess the part?

[A.Gramz]

I'm starting to go through the stack of parts the we're stuffed into the car when I got it.  I'll start by asking where/if this goes with a 73 challenger. 

Thanks
Adam

[anlauto]

Radiator coolant overflow bottle bracket 

[A.Gramz]

Radiator coolant overflow bottle bracket 

I would of never guessed that. 

[YellowThumper]

Yup.
Discussions have noted 74 only.
Looked ridiculous on mine. Designed to clear large rad. I only had the 19".

[jimynick]

Yep, looks like the one I finally found for my 74. It bolts to the rad support beside the battery and it is, 74 only which can be a PITA.