I need to replace my Shimano 600 tricolor headset. It's all indexed and dimpled, sadly.

If I thought bottom brackets were incomprehensible (I'd rather read Heidegger on Dasein than Sheldon Brown on bottom brackets!), headsets are a close second.

So the "stack height" of the current headset is 33.5 mm. How close does the new headset's stack height need to be?


And if you don't mind, a second question: I'd love to find an NOS tricolor to replace this old one, but am having no luck finding one. Any suggestions on one that would look similar/appropriate? I know Velo Orange makes one, but I'm sour on VO stuff after a bad experience with a set of VO hubs...plus the stack heights are over 40mm and that makes me worry...)