You might want a Tiagra 4600 gs - it’s rated for a 30-tooth large cog, but I have heard it’s easily pushed to 32. The pull ratio is the same as 8-speed. (Tiagra 4700 will not work - pull ratio matches Shimano 11-speed.)
Some Dura Ace setups have a unique pull ratio, but not those shifters. I think it was the 7-speed downtube shifters. Sheldon has a Dura Ace compatibility cheat sheet.
https://www.sheldonbrown.com/dura-ace.html