speak to your mapper and see what he advises for plugs .........he will be the best one for advise..............probably c57's or 071c's as they seem to be flavour of the moment
as for leadsi use magnecors (the thick ones and they have been fine now for 10,000 miles some people recomend std ones........! i think its more personnal choice
but i chose the magnecors as they are a good brand and had had people tell me they have had no probs with em