Douglasskemp

Hi there everyone!
I don't currently have a Mopar, but I am not completely unaware of them. (Old Jeeps are TECHNICALLY Mopars correct?)
The whole reason for me to join the forum is due to my other hobby.
My idea is to make models of all the cars from the movie The Gumball Rally.
My biggest hurdle is that nobody makes a model of the 1971 Dodge Polara. Since I don't know about the car enough, I don't know what I could start with. What car would y'all suggest that I start with? Possibly with a similar body, or roof.