P
Pennykatz
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- Last seen
- Joined
- Oct 22, 2018
- Thunderbird Year
- 1956
Our 1957 has a porthole, how do I determine if it’s model C, D, E, or F?
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Look at the data plate on the firewall near the distributor. The serial number will start with the letter C,D,E, or F. The second character will be a 7. Most likely you have a D code. 312 C.I., 245 horsepower, single four barrel carburetor. As an asid there are a very few D code cars that are referred to as DF cars. They are the early supercharger cars and have slightly different fuel filter than F code cars and a few other visible differences. A DF car requires documentation for proof of status as a factory supercharged car. Porthole has nothing to do with the engine installation. Porthole tops became optional in 56 and were relatively standard on 57s. However there are some non-porthole tops that look like the 55 or 56 top without a porthole but they have a different badge.
good luck and buy a shop manual.
If you can't afford a shop manual you can't afford the car.