"Custom" Shift Linkage

Hi! I have a 74 dart sport that has a 318 and an automatic 727 from 1967. It originally had a slant-six and an automatic 904. As of now, the way the shift linkage is set up makes it so the needle on the gear indicator doesn't match up with the letters and it can't shift into first manually. I have the shift linkage from 1967 and 1974. Does anyone know of a way to make a fully functioning shift linkage? thanks.