Another thought on the steering box, the Burman boxes tend to leak and all the oil drains out. It's worth topping up and seeing if that helps. Alfas are pretty nice when newish, a new set of front suspension bushings will help a ton.
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Ian Lomax - Current: 1973 Berlina, 1987 Milano Platinum "racecar"
Past: 71, 74 Spiders, 2x 74 Berlina, 74 GTV, 76 Alfetta GT, 88 Milano 3.0, 164LS