I've had these for a while and have been curious who makes them and what they are? I have reason to believe that they are supposed to be a '79-'80 Dodge Ramcharger,which could be the only example of that truck in 1/64 die-cast.

http://i9.photobucket.com/albums/a62/notablazer/Other/10-3004.jpg

I got these many years ago at walgreen's under their "speed wheels" brand,but haven't seen them since,especially since they're all maisto castings now..

maisto is the parent company for speed wheels.........the wheels on the white one were the same ones used from 1980's and 90's matchbox line.

The grill on the yellow one is a 1982 Chevy Blazer, looks like the white one has the same grill

http://brochures.slosh.com/1982/blazer5.jpg

It may look similar but it looks a little more like the 79-80 Dodge,here's a '80 Ramcharger (my old project truck):

http://memimage.cardomain.net/member_images/11/web/2351000-2351999/2351836_12_full.jpg

Scratch that.

Can you tell whether they're Blazers or Ramchargers by the location of the parking lights/turn signals?