yes Phil Holmes has a ian howell CVH 43mm big valve head with them flow figure as stated above 122CFM at 0.450" and 10"

he gets very good times with only 15 psi boost 0-60 5.4 / 0-100 11 1/4 @13.8

Canada1

i remember reading about the guy croft CVH head which he ported on his forum

i was also reading about different valve shapes he said that the seat/valve combo response depends very much on the short-side radius so might be good to post your finding on his forum see what he says about it losing 10 cfm flow with the bigger valves