1984 Heater assembly removal.

It has factory air and I have the heater/AC assembly loose from the firewall and partially out. It will not clear the dash as it hangs up on the
floorboard transmission hump. I've removed the center console, the removable ducting, glove box and door. The Haynes manual says it should come free. Does anyone have any suggestions. :banghead:

I've had to pull the dash to get the heater box out on A/C models. w/o A/C the procedure is what you've said