Well, as the doctor, upon his patient telling him that his arm hurt when he lifted it, said to him "then don't lift your arm"...I will say - don't use that saddle!
But the good news is you have a great bike that you can tune to a great ride!
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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"