Yep turbo for the 4 cylinder, superchargers for the V6 and the V8. I have seen a few turbocharged V8's but your getting more involved than I think you want to be with that. Performance computer reprogramming is another way to go but not as much all out power gains with that but it helps. Under drive pulleys can give you a little more. But if you want big gains your goin to have to dig into,the engine, and if your running an automatic you will have to beef that up too. And it snowballs from there, brakes, suspension, etc.
Save your money and buy a vette
Looking for a Used Thunderbird in your area?
CarGurus has 1,014 nationwide Thunderbird listings starting at $7,000.
Search Ford Thunderbird Questions
Ford Thunderbird Experts
Related Models For Sale
Used Cars For Sale