Dont take me wrong not willing to offend you just making a point... for that P _ S bike the best and cheapest stuff u can get is the velo orange friction shifters. The bike is so old than even the cheappy sora stuff will work even poorly as it is right now. In a matter of fact if you want to spend 500 bucks in a set of campagnolo 11 shifters you will need to change almost everything else, the same if you want to go dura ace or even 105. And pretty much only with buying the shifter u will be spending more than what the whole bike worth.

I had 900 to trash in something like adding brifters to this bike I would go, buy a new one bike and give that one to the salvation army.