Let's not try to make this harder than it really is.

The intakes are the same on 1967-1969 440 engines. 2806178

There's really nothing more to say about it.

1967 440 magnum carbs have 1 11/16 throttle plates, all 4 the same size.

Remember the good old days when you could buy a full size 440 Mopar for $300 and drive it? Well the first thing to do was toss the junk factory Holley and put on a 440 HP AVs carb and they always bolt right on to the intake.