I live right next to the salt flats, we have a few chunks out here we fly model airplanes on. I always wanted to build a salt flat racer, and the thunderbird was one of the most aerodynamic cars made for years and years. It's more about high gearing and stability than horsepower, although you obviously need both.
The "planned build" was a 255 crank (the 4.2? V-8 only really used from 1980-82 or so) which is something like 17lbs lighter, some old school trick flow high ports, swap from the 7.5" rear end to a 8.8" rear with something around a 2.48 final drive (optional late 70's and early 80's 3 speed non od transmissions mainly) and a t-56 "viper spec" with the .50 second overdrive gear. I did the math forever ago, it was something like 1100rpm doing 75mph in 3rd gear with something like 283mph theoretically possible in 4th gear at 6,000rpm. At the time, I believe the class I was aiming for with an stock unaltered body was only in the 160mph range.
I really got to get back to this truck and get it all ripped back apart. I have caught some sort of bug that just will not go away. That mixed with the heat and all the other stuff I got is just making hard to find the time and motivation in this 102°f heat.
1985 bull nose 460 cab and chassis bucket truck. T-19, hot fuel handling and more splices then an entire telephone infrastructure.