Carter AFB Secondary auxiliary valve assembly
Why would Carter machine the carb body with the saddles that hold the valve if they were not going to be used?
I can’t say for sure but when I noticed this on my old friends boat with the 440, I asked how it performed with of course mentioning the lack of the air velocity valve.
He said even in the dead of winter, stone falls start, drop it in drive and nail it, it would burn rubber and take off no problem.
Now do be reminded it was a 600 cfm carb.
Under cfm carburetor? In a way, yes, in a way, no. A luxury ride is just after torque to move its weight and ultimate top end rpm power is not worried about. As long as the boat moves on demand, the customer will be happy.
I can’t say for sure but I think it had a 2.76 ratio.
Anyway, the big engine can handle a wide open throttle from a standstill even in the big car.