Didn't have much time to post over the weekend, spent it working on my dad's car and at show and shines. But, I did check to see what I was turning at 70. It was 2500-2600 RPM with a 27" tall tire (255/45/18), close to stock tire height with an 18 inch wheel, if you have 17" wheels, you will most likely have a shorter tire and turn more RPM than that.
Former owner of 94 Bird with DOHC 4.6L swapped from a mark VIII
2011 CTS-V Wagon
1968 Torino was an original 289, C4, fully documented numbers matching car. Now: DOHC 4.6L/T-56 swapped, Cobra intake, IMRC delete, BBK long tubes and H pipe. Dynotech Aluminum Driveshaft, 9" rear with TrueTrac and 4.11's.