On a classified highway stretch I got my '69 440 4-speed to bury its 150 MPH speedo. Tach at 6k. This on 3.55:1 Dana. 28" rear tire. Grant it. The speedo and stock tach is 50+ years old. But GPS confirmed 140+ MPH. 440 is a little built than stock. But just purple grind hyd cam. Some head work. Eddy low deck torquer with Holley 750.
My GTX may not be a drag strip king. Takes too long for the 440 to get into its power band. But it's a highway commando. I only lifted because some valve float could be detected. And fear of tire performance. Another words it was still pulling. And surprisingly stable ride.
I drove to a station off highway. It was sitting there idling normally. (Only difference was a little higher water temp.) And I swear it looked at me saying "Pussy" lol.
Below is quick walk around vid of that car idling.
