Hello I’m new to the Thunderbird Forum so bare with me. I actually don’t own a Thunderbird but agreed to work on a friend of mine’s. It’s a 1955 all original along with 41,000 actual miles. First of all it needs a set of tires, and was wandering what would be an original looking set that would be correct for this year? As far as the size of tire and how wide of a white wall? I want an original looking tire but in a radial version. 6.50x 15’s are on it now. Also what motor and transmission would this car come with? I’m guessing a 312 with some kind of 2 speed automatic. The valve covers say “Thunderbird Special” I believe. And one other thing where is the best place to shop for parts for it? Any information would be greatly appreciated thanks in advance!
A 1955 Thunderbird has a 6-volt electrical system, it came with a 292 V8 engine. The 312's were not available until late in 1956 and them in 1957. If it's really a 41,000 actual mile car it probably still has the bias ply 6.70-15 tires. There are radial tires available to fit the 15 inch rims and are available with the 2 inch white walls too. They are kind of spendy, around $600.00 each if my memory is correct. If it has an automatic transmission, they were three speeds. The automatic was called a Fordomatic. A lot of people change their 55 Thunderbirds to a 12-volt system. I understand why but there are some things that will need to be converted, like the 4-way seats, the generator there is a 12-volt generaator you can use instead of using an alternator. Don't forget the radio, clock, heater fan motor and all the lights as well. Good luck, its an endeavor you will remember.
I have owned my 55 Bird since 1987 as second owner. I am determined to keep it all original as much as possible. I appreciate that you may believe it has 41,000 miles but you may note that the last digit in the odometer is not in tenths like modern cars. The last digit is miles. So, you may want to take another look at the miles.
I hope to keep my 6 volt system as I have never had an issue. However, there are a few issues; I only use Optima 6V batteries with more output than most 12V batteries and there is a great old style case that covers the Optima to make it look original equipment. I converted my old 6V generator to an alternator housed in the old style generator so it looks original.
As I always say, you do not buy a 70 year old car and then look for the cheapest way to maintain it, it is like growing old, it is not for sissies.
It is simplest to keep it 6V and make a few mods instead of converting this wonderful example of the 50's to something different.
I converted my old points to
electronic ignition with no visible change. All exterior light bulbs are now LED and Halogen headlights. These are simple projects that the old bird deserves.
Before you purchase tires, ensure the date of manufacture is current. Do not accept old tires that have been on the shelf of dozens of years. My tires were about $400 each, wide white walls. Do a google
search for best prices or a trusted tire shop. Then you must decide radial or not radial. Good question for this Forum as much knowledge is available from this group. I learn from them.
I expect my post will be tossed out as was my last one because I did not follow exact protocol for one reason or another.
Best of luck with a fun project.
