What carb for my 340 build?

Unless this is a street only car the choke is useless. The choke is the single biggest piston ring killer there is. These engines only need a very rich mixture for the first 10-20 seconds after fire up. Any longer than that and you are using excess fuel that does nothing but wash the oil off the cylinder walls and increase ring and bore wear.
Old post I know. I guess pumping the carb multiple times to get it to run without a choke is not washing oil off either. My only issue with electric chokes is how fast they come back on when the car is still warm. Divorced chokes definitely do it better there, but are slow to come off when the car is really cold. Later 70's models had the divorced choke with an electric element to speed up that come off.