Ok, I trust you Charrlie.
I'm sure you know that on a 64, the heater/def is controlled by 3 knobs that pull out from the dash. It seems logical to me that in the OFF position (no heat or def) that those knobs would be pushed in and not protruding away from the dash. My problem is 2 of the knobs currently must be pulled out to turn everything off.
I compared pics of a 64 FSM to a 68 FSM and two of the doors have different rotations.
I'm just looking for a correct heater box to fix that. 1964 heater box picture needed
