I can see Dennis will be on a "hunting" trip to Australia soon, he knows there is a spare sitting on my shelf here in UK, those red PA Kingston carbs seem to be hard to find, especially where Twin Power Gasoline tractors are more common,
Note the different air inlet to the brass ones, these cast ones are made for a rubber hose connection to the air cleaner steel pipe.
Happy Hunting Dennis.
Very nice tractor to ad to your collection Buck, is that next winter's project??
Malcolm.