I am looking for drawings and instuctions to replace the heating system in my car including the valves, vacumn hoses, cables etc. All the shop manual I’ve found don’t have a section on that for some reason.
Don’t know if this will help, but essentially ’52-’56 (except ’56 is 12 volt) are identical heating systems. The location of the control levers in the dash assembly are slightly different but the balance of the system is the same. I have done several of these systems so if you want to email me separately I will see if I can be of help. Email is email@example.com
There is vendor advertising on ebay a heater removal instruction under 1954 Mercury parts.