I was wondering if anybody has changed their valves from a 1.94/1.50 to a 2.00/1.56 without any changes to the heads?

 

Did you mean change to 2.00/1.56 using 2.02/1.60 valves?? Anyway, I just built a L98 using the 113 Vette aluminum heads. We were able to start with 2.02/1.60 valves and we fit them to the stock seats (they were in excellent shape). After the five angle valve job and cutting down the valves we ended up with 2.015/1.56.

Hope that helps.