Just aw this posted on facebook ! maybe of interest to some folks here. https://www.facebook.com/groups/709087063100668/permalink/902067667135939/
I was thinking the same, what years swap. I'm an accessory to the crime on swapping grill / bumper on 2 of them. My buddy loved 67-72. But could mostly find 73-79's. We would always grab clean parts when we saw them. Daily driver trucks got all the salt. The farm trucks didn't get as much rust but every panel and bumper was dinged up, took pieces of a few to make a good one.