Steering Box Universal Coupling Sizes

It doesn't say in the ad but I suspect the coupler is for power steering. I don't show a listing in my books for any of those part numbers he mentions. Is yours a conversion from power? If so, you'll need to change the shaft too as yours will be too short, or, you can buy one of those megabuck adapters and keep your existing column. Buying the correct column is usually cheaper and you end up with some spare parts!