1. 88 and 109 are the same steering assembly.
2. Steering wheel and hence column (different spline/connection) changed about 1967, but complete assemblies are interchangeable. (earlier wheel & column & box are the same as Series 1 from 1955, but you are unlikely to find one)
3. Series 3 steering wheel is the same as the later wheel, and the box/column are pretty much interchangeable except for trim issues. Late S3 wheel, fully interchangeable, is a much better grade of plastic.
Hope this helps
John
				
			 
			
		 
			
				
			
			
				John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
			
			
		 
	
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