NONE of the stock GT550's EVER had electronic ignition from new. In fact NONE of the Triples had electronic ignition. The last 2 Titans (1976 and 1977) DID have PEI but, of course, they were Twins so, unless you are willing to do a LOT of work, that is of no help to you. You could, conceivably, get ignitions off 3 scrapped PE175-250-400 dirt bikes and rig something up but that would require almost as much work as rigging up a Titan PEI. There ARE aftermarket electronic ignitions for the Triples made by Boyer-Bransden and Newtronics? both out of England. A number of my friends with Buffaloes have the Boyer ignition and are quite pleased with the performance and big fat hot blue sparks they get, even with the stock coils. Good luck in your search.