is a 57 tbird pos or neg ground
The information I found indicates Ford went to negative ground in 1956. You might want to confirm that.
Negative ground. http://ctcc9.blogspot.com/2008/06/tech-tip- polarity-of-coil.html
56 Bird is 12v negative ground
Looking for a Used Thunderbird in your area?
CarGurus has 21 nationwide Thunderbird listings starting at $13,595.
Search Ford Thunderbird Questions
Ford Thunderbird Experts
Related Models For Sale