Congressional Universe has full text of debates and speeches dating back to the 99th Congress (which should cover this situation, since that was 1985-1986). When I searched for Biden, I found several documents, including one from July 23rd. When I added the other party’s name (Schultz), I found some debates where the name “Schultz” was mentioned, but none where both he and Biden were participants.
In fact, I just checked and it is spelled “Shultz.” Drop the “c” and you should find it.