Motion Pictures Unknown A/G car

This morning i was on one of those American Graffiti pages on Facebook and they gave a link to a site with info. on all the cars in the movie, which I've posted before.
http://www.imcdb.org/movie_69704-Am...HDtE8OYij6jiVH25ofDX3szB8y933GTjWedtz8uzHof4o On this website i came across a car that said " Unknown" in reading some of the comments some of the suggested cars are '39-'40 Ford, '46-'48 Ford, and '39 Studebaker Champion Coupe. It's a night shot so it's going too be hard to tell but i thought i'd inlist the power of the H.A.M.B. to try and figure this out. I don't see a devider in the rear window so I'm thinking '39-'40 Ford is out but it does have a rib at the bottom of the rear bumper so I'm going with '46-'48 Ford.

 

Taillights aren't right for Ford, perhaps late '30s Dodge/ Plymouth?

 

Can't tell much from that night shot. Sorry.

 

That's what i was thinking to.