There's 4 nut's on the firewall, 2 heater hoses, Must take blower motor out before removing box.
Then inside there's peice of trim that has to come off, then 1 nut for the support bracket, Unplug vacuum hoses off the control switch, unplug the vacuum supply hose, glove box liner and then I'm not sure from there.
Save that box or send it to me!!
Oh yea have to unplug the blower motor from the windshield wiper motor plug at the firewall.