Did it myself. Done.

http://imcdb.org/movie_94962-The-Dead-Next-Door.html

Listed the vehicles but the pics will need to be resized. They're too large.

Looks like you called it. U.S. market Datsun F-10 "Sport Wagon," 1976-1978.

That "Unknown Japanese Car" is a Datsun F-10.

Unfortunately, that's as good as they're going to get. It's a cheap DVD of an older, somewhat degraded film.

Some of those images are quite distorted...

IMDB page: http://www.imdb.com/title/tt0094962/

Vehicles:

1975 Ford LTD wagon. Four stars.


Closer front view of the same.


Unknown Japanese car. I think it says "Datsun" on the back. Three stars.


Closer view of part of the front.


Side view, with rear badge barely visible.


1975 Chevrolet Nova. One star.


Left to right: 1977 Oldsmobile 98, 1983 Mercury Cougar, 1977 Chevrolet Caprice. Any of them are one star.


Dodge B-series van. One star.


Rambler Classic, unknown year. One star.


1970 Chevrolet Monte Carlo. One star.


1973 Cadillac Fleetwood. Two stars.


Headlights of the same...the arrangement of them is what makes me think it's a 1973.


A few more independent horror films are forthcoming. Cheers.