Ricks56: Do you have underhood braces?
A couple of notes--first, re
wunderwerk's Town Victoria photos: Interesting to see that this car doesn't have the 4-door hardtop's usual underhood braces--perhaps they were remove from this car or the earliest examples didn't have them. What's the date code?
Here is an underhood shot of a Town Victoria with its braces in places to compare with wunderwerk's:
Note the radiators in the two shots--there were two tank shapes in '56, the one just above and the flatter-topped one seen in wunderwerk's find--I've always read that the larger, flatter-topped ones were used with 312s. Seems to me I've seen '56s with "factory" a/c, whether on 292s and 312s, with both types. The engine left above is dressed as a 312, but the radiator tank is more common to 292s/272s. Note the shadow of the decal on wunderwerk's engine--looks like it was the kind that reads "Y-8" with "Interceptor" underneath. This was unusual--312s generally had the "Thunderbird Special" decals, while, 292s read just "Thunderbird"-- (also note the aftermarket tubing for the valve-train oiler)
As for "factory" a/c--my understanding is that there were few if any units installed at assembly plants. A car ordered with a/c had the components placed in the trunk before shipping for the dealer to put in. I've never seen any mention of a pre-drilled dash. Somewhere I have the instruction sheet with templates for the drilling and cutting necessary to install the registers etc. Btw, the '56 compressors were he first to use magnetic clutches; the '55s required the removal of the belts in winter.
As for
CarlG's comment about the evaporator hanging under the dash--while Ford integrated the design of '55 & '56 units into the dash, as well as the '57's (registers stretched out along the base of the windshield), I believe that starting with the '58s, the SelectAire evaporator unit was hung below the dash. This lasted through '64... it looked like aftermarket units and was very uncompetitive, with GM, even Chevrolet, having had in-dash evaporators and vents on its cars for years. Even before Cadillac, Buick & Olds switched from trunk-mounted units to in-dash in '57, Pontiac had in-dash evap and registers in '54. (So did Rambler/Hudson etc).