Here's the IMDB link...

http://www.imdb.com/title/tt0064449/

...and here's the link to the IMCDB page:

http://www.imcdb.org/movie.php?id=64449

First, some alternate shots of the 1968 Imperial Crown already seen on the site:



Now the others:

1964 Chevrolet Malibu, one star


Rolls Royce unknown, three stars


1968 Plymouth (GTX?) convertible, two stars


unknown, two stars


1968 Chrysler Town & Country, three stars


1964 Buick Skylark, one star


unknown motorcycle, two stars


1966 Chevrolet Impala (SS?), one star

Jaguar or Daimler.

http://www.imcdb.org/movie_64449-How-To-Commit-Marriage.html
The last one too part seen for a 1* car
By the way, it seems you are filling in all the 'Imperial blanks' in the site. Great.

Thanks. I love those Imperials. I'm surprised whoever put the originals on the site didn't manage to find the ones from "The Beverly Hillbillies."