The Luis Davila that you are looking for is my brother. We grew up in the South Bronx. He joined the army in 1972 and was stationed in Hawaii in 1974-1975. I joined the Marines in 1973 and stayed until 1993. Luis lives in upstate NY now and I in San Diego. We communicate with each other at least once a week.
I notice that your posting is over a year ago, but if you still check this site contact me and I will get you in touch with him.