Sorry, but the first thing I change out is the shifter to a Hurst so I never have to worry about it again. And that was a long time ago on my 62.
Look in your shop manual or ask on the Corvette Forum C1+2 forum. They're quick with a response and good guys as well.
This link should work....
C1 & C2 Corvettes, 1953 - 1967 - Corvette Forum