I need help with a lot of stuff...

am wondering what parts will I need to switch to get the 65 dart front grille on there? Will I need the whole front cip, or do you guys know if I can just get the grille and swap it out?
You will need to change the whole front clip, hood fenders grill valance panel and bumper and brackets.

You will need the whole front clip. Fenders, hood, grille.......all of it. I'm even unsure the doors are the same. I don't know. They may not be.
Doors are the same, but the trim will be different. Body lines are also the same. I would get a parts car for the swap because it makes it easier than trying to piece meal it together. Once completed you can sell off the remains to recoup some of your cost.

The front-end parts are the same 2dr or 4dr or even wagon.