I am replacing the heater core in a 1990 Chrysler New Yorker Fifth Avenue. I have everything gutted and the Heater/AC unit will not drop. I have taken the bolts out that are sticking out of the firewall, removed all the heater hoses and a/c lines. The assembly is lose and I can move it slightly. Does anyone have a diagram on all the bolts or anything that could help me. I would be great if some one could help me.

Thanks,
Justin