dart fender splash shield questions

Will the metal 72 ones bolt up to the 73 body or are the mounting points different?
I found one marked 74 LH in my parts stash. I had tried to fit it before but no go. Today I scrape the undercoating off to look for a part number and behold! its actually a RH. Damn, labeled it wrong. Going to see if it fits in a few minutes.