Duster Parts Interchangable?

harleys by no means am i an expert on this but here goes.....as far as exterior parts goes. i believe that 70-72 are the same , just different grills. interior should be about the same as well. the 70 may be the only real execption here. the dash in the 70 i do believe is slightly different than the 71-72. there was a rally dash for the 70-71 that is the same though. the 72 standard dash had a seatbelt warning light in it. that may be the only other difference there. the rest of the interior i think is the same....maybe someone else w/ a duster can help. the local junk yards can tell you also what interchanges for each year. hope this helps some...