single carb conversion

I'm continuing to race a KZ400 in AHRMA. In your opinion which engine had the greatest performance? I've been trying to sort out all of the data and it looks like a 1979 might have the greatest potential.

 

Nobody has posted on this thread since 2018, and several of the posters are no longer around. A new thread of your own might get better traction, especially if you are not asking about a single carb conversion.