Speakers on my 84

Hi-everyone. I'm looking to get a basic system installed in my 84 Chevy Impala. It came w/the 2 speakers upfront and then the AM radio. I was wondering if any one here knows what size they are so i can get a direct replacement. Also-if there's any other things i should be aware of and i plan on having the store do the install. Thats all-thanks for the help.

If you plan on having the store do it, they should have software/books that tell them the direct replacements. If you are gonna do it yourself, then they should be able to tell you what to use. Crutchfield may also be an option to tell you what you need. If i'm not mistaken, they usually run 4x6 in front and 6x9 in the rear.
www.crutchfield.com, go to "what fits my car"