I had a friend that had a 1970 GTX with 3.55 gears. It had a bad motor in it. He found a 383-2 out of a 71 Newport with 2.76 gears. We installed the engine and trans from the Newport. Didn't change the speedo gear. He always bragged how it would run 120 in the quarter. He couldn't comprehend that he wasn't really going that fast.
