I am building a 1968 Dart SS/AH chassis spec car, or rather close to spec for I could never afford to run this class but anyways I know they all like to run Ford 9" because they can change gears out much quicker. I don't plan on trying to change gears all the time, honestly, I may never change the gear ratio. I would just install a fresh set of gears in the car every couple seasons. Ford 9" are a lot more expensive to build for sure, which is why I am leaning towards the Strange Engineering Dana 60. I had a Strange Engineering Dana 60 in my tube chassis Challenger and after 7 seasons I had to put a fresh gear in it due to fatigue, which in my opinion is pretty good after 7 seasons of 950hp and 870 ft.lbs of torque. There was a chassis guy that gave me a hard time for running a Dana because he claimed it "twists" when under load. He was the only one I ever heard say that but I am always open to opinions/ learning new things. My new engine will make between 1,000 to 1,100 hp and car will weigh around 3,000. What do y'all think?