Paul the chrage woudl be the same for any Mikuni type carb 26-44 mm
BTW, I see the Vintage YZ engine in your avatar, a reminder that PWK carbs are not legal for any AHRMA Vintage Mx racing.
Anyway-looks real good to me.
I would charge at least $ 125 to buff a Mikuni/Kehien carb. I have buffed a Bing for $80, it was easy, though with many more flat surfaces.
James