According to this:
http://www.campyonly.com/history/1974/chainlines.pdf
There is a 1mm difference between a 68-SS-120 chainline, and a 68-P-120 chainline.
I have the 68-SS-120 bottom bracket. So the question now is, where would a pista chainring line up on the spindle, closer to the inner or outer chainring?
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1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"