Man you sure are making good progress!, Id love to be as far along on my duster as you are on the dart.
as for the fender......I know how ya feel.....my dusters passenger front fender had been wacked before pretty good and it ruined the center body line......someone previously tried to repair it and didnt do thast great of a job, then I did what I could to straighten the metal out and bring the body line back and smooth it off with filler but it seems like no matter how much I worked on it I still couldnt get it to look "right" and I think the only real fix is to eventually get another fender and stop screwing around with the dang thing lol.
only thing is, it seems like jsut a couple yeaqrs ago I was seeing duster fenders pop up on craigslist all the time for cheap...like around $50.00 , now all of a sudden everyone wants $200.00 for one that has rust or dents/dings and I just cant afford it. So I am going to wait it out and hope I stumble on a good deal one day.
as for the front clip.....I like the 70-71 style personally......and if you could get a REALLY gooddeal on the whole setup I vote for that.....BUT if the cost of the entire front clip is more than what your looking at spending on a fender....I say just get another fender and keep her all original.
good work buddy and keep it up.