73 dart front end to 68

Hey guys, I recently bought a 71 valiant 4 door that has a pretty good hood, grill, fenders and door panels. I am thinking about putting the driveline (Built 360,727w/2500tci stall and rebuilt 8.75 with 430 gears into something like a dart. I have found a couple of good project darts but they are 73. My question is can i convert the front end to a 68 style? I love the way the hurst Hemi darts look.

second question is what all a bodies with the parts from my 71 valiant fit? Mopar mixed and matched on all these cars so much its pretty confusing and I can't seem to find a reference list of interchangeable grills fenders, door panels etc,,,,

thanks again guys.