They made two styles for the Vega / Monza of that era, one was a quick ratio, the other standard, if the one you have was the quick ratio, it would be normally harder to steer. Looking at the pics you might need to just clean and rebuild/adjust worm and sector, when done fill with STP honey and 30 weight oil, it will not leak out and make the parts slip more, if that doesn't work for you you might be able to use a GM 525 steering box in its place which is power and might bolt right up.