Long ago I had a successful experience with King hubs, Campy Record 10speed levers/derailleur and a Shimano cassette on my cyclocross bike. Rode it that way for many years.
No problems whatsoever and I had even bought a shim kit from Wheels Manufacturing to correct cog spacing that I never needed to use.
I tried the same lever/cassette/derailleur setup on my road bike and it didn't work well at all. The only variable I can think of was a shorter chainstay on the RB but I don't know if that would account for the poor performance.
I never tried the shim kit because King had come out with the Campagnolo splined R45 hubs and I bought them. Those drive shells broke many times, aluminum and stainless
Back to square one.