Retro Grouch hit the nail on the head. Brifters are meant for modern bikes;I don't think they were even made in 7spd.
relnix: what are you looking to do? If you just want to replace the shifters,the quickest/cheapest solution would be barcons,which plug into the ends of the handlebar. Set to friction they'll work with almost anything. If you're looking to get your shifters up with your brake levers,they do make adapters for barcons or old thumbies that mount them next to the levers,but they can be kind of pricey as well(around $150).
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X
