66 Nova,350 small block well built, 700R4 Trans, 3.90 Rear, 26 inch tires, no speedo, 5700 RPM in 4th gear overdrive=160+MPH. An online performance calculator got me to this number.
http://users.erols.com/srweiss/calcmph.htm
Absolutely the scariest 5 seconds in the car. Had to do it once.