E44=318
EN2= I think it has to do with the assembly line, line #2?
216=schedualed build date of Feb 16, 1973?
I think it started life out as a non-Rallye car. '73 and '74 cars did not use the "JH" and "JS" designations as did the '70-'72 years, Rallye was made in option package in '73-'74. If it did have the Rallye option then I think the code was A57 on the fender tag.
What's that Jy9 code? Twice? Is that the body color code? If so, it may have been a dark shade of gold, maybe Dark Gold Poly.