Thanks all for the information and pointers, 
 
Definitely the way i'm going to go, i've been in contact with a few companies and i'm looking around £1600 for a crate engine. 
 
Some interesting links given and i particularly like the supercharged build. 
 
If i decided to build a supercharged engine i think a used engine would surfice as this would need rebuilding and upgrading anyway. I think if i'm going with throttle bodies, engine management etc, a new unit is what i'm looking for. 
		
	
		
		
		
		
		
	
		
		
	
	
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