hey guys wonder who could help out? i have an 85 stang and want to put the 87-93 dash in, is that a straight swap? or do i need to change stuff? will i need the heater box from the 87-93 as well? if so are the holes for mounting the heater box already there? or do i have to drill my own? do the mounting brackets line up for the dash? do i need the mounting bracket for the emergency brake? thanks in advance for your help