Originally Posted by
crank_addict
For now, could simply remove the left lever and / or try for one of these single levers. This one is going on my Bottecchia. If conscientious of date, I'm sure the guru's will answer.

I was looking at this one on ebay. I have no idea what it looks like under the lever, but it looks like it might be the type?
Campagnolo Gran Sport Single Shifter with Bracket Italy 70's Used | eBay
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My bikes: 1970`s Roberts - 1981 Miyata 912 - 1980`s Ocshner (Chrome) - 1987 Schwinn Circuit - 1987 Schwinn Prologue - 1992 Schwinn Crosspoint - 1999 Schwinn Circuit - 2014 Cannondale Super Six EVO