2 door, 4 door, wagon...front clips are all the same for the same year.
You can swap the entire front clip, everything that bolts on. The bumper AND bumper shocks are different as well. It should all just bolt on, direct swap. May have to swap the rear bumper and shocks as well if they are going to be picky.
Lots of other differences between 79 and 80 as well but I dont think they'll matter for your application. Its strictly appearance, correct?