I replaced my SSS’s stock coil for a Crane LX-91 coil. That with Top Gun leads and Iridium sparkies, resulted in yet another few points of power improvement.
However, if you decide to do, then be prepared to replace your dizzy cap and rotor every 20,000 klicks. Due to the high current being loaded from the coil on the stock parts.
Example of Crane Coil & Top Gun leads:
http://www.ebay.com.au/itm/like/3613...s=true&viphx=1
http://www.topgunignition.com.au/topgunleads/home