Duraspark is the only one that has the 4x6 (about) size aluminum looking ignition box bolted to a fender etc.  Most of them say duraspark on them. 
 
The distributor should have one connector/harness thingy  on it. Black/orange/purple wires I think. 
		
	
		
		
		
		
		
		
			
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				Frank
			 
		
		
		
		
		
		
	
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