175.39mph in my 74 Duster

I have been 115 mph in my 70 340 duster, I can;t imagine what 175 mph feels like. I was hanging on for my dear life LOL. Great job..Wish I was in the passenger seat.. Whats the next step, diff converter I assumme and then obviously have to mess with gearing again..man what fun!!! Oh by the way great lookin car.