a girl had a car and the battery was bad, to keep costs down, find a smaller battery with the posts oriented correctly. most cars want you to have a battery that will keep up with all the electronics in your car ie.. power widows, ac, heater fans lights, door locks and such. if your not using all those things you can get away with a small battery. of course it won't usually last as long maybe 2yrs or more but like me and her, you do what you have to do.. so don't worry about replacing the battery with the called for one unless you want to stay original, you can always later buy one. just don't use everything at once if you have all those types of goodies but don't figure you do.
Walmart sells an excellent battery that is built by Johnson Controls the same company that builds OEM batteries for many auto manufactures. They will have a battery that will fit your T-Bird.
It's like $100 at O-reilly
I'm sure you can find a group 27 or 29 battery for around $80, make sure posts are oriented correctly.
A GENUINE MOTOR CRAFT one that fits EXATLY! UseeBay for answers! GOOD LUCK!!
Just get a good battery from Autozone. I think they sell both Duralast and Optimax batteries for around $200. Either of those should work fine.
The original 29NF battery is like $400 and I'm a poor bastard so?...
