The Unichip piggy back's to existing ECU and will replace mechanical advance. Requires a specialist install and tune and in the order of $1,500 these days. You may also need to change coil from memory.
The next is a chip to replace existing fuel maps. I have one of these in a D1 that matches my driving conditions and minor mods like heads, intake etc. About half the price of the unichip and a self install.
Tornado Chips



				
				
				
					
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. They seem a pain as cant get softwhare or conectivity to tune (Have acces to a dyno) If I can't find one in central NSW I'm going to take it out. Might look at different Fuel and duel advance setup that can be tuned by DIY laptop. 
				
 How am I going to fit a setup like yours in with a blower,duel bats,Gas and make it like deep water
 The boats don't do well here in the mud
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