Mounting new fenders and hood

I have had some body work done a while back and have had the panels in storage for a while. I am getting bored and want to try to put the front half of the body onto my daily driver.

1975 Plymouth Duster /6

My main concern being, how difficult is it to switch the fenders? will I run into issues with the turn signals and what not?
I will try to get pictures and post them. Body is brown and the new panels are still in primer.