hey everyone i have a 87 gt that was speed density. i am replacing that with a mass air harness from a 1990 mustang dont know if it was and lx or gt. i am looking for the wiring diagram for that harness do to the fact that by the pcm there is a gray circle conector with six pins in it that looks like it connects to the main harness (maybe) idk. the theres two white connectors by the mass air clip. one has four pins in it and the other two i need to see what those are for and if i will be ok to run with out them connceted. thanks for any help