It is either a 74 or a Series 2a, it can't be both, as the 2a was replaced by the Series 3 in 1972. Easy to tell unless it is a bitza - most parts are interchangeable - 2a has instruments in the centre, 3 has them in front of the driver.
Most parts are readily available, and reasonably cheap - if you give your location we can be more specific. 
I suggest that you spend some time reading the Series 2/2a and 3 sections on this forum - and in particular the 'Good Oil'. If you do not already have them, workshop and parts manuals should be high on your priority list. See 'Rave CD' in the forum Shop, top bar, just below the banner.
Joohn
				
			 
			
		 
			
				
			
			
				John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
			
			
		 
	
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