Interestingly the 337 is considered a max wedge, but as delivered the ports are really only slightly larger than 1/2 way between a 906 and a true 2.6" x 1.3" Max Wedge. They may have done this intentionally in the height to allow it to be used on a well ported 906 size window.

One great feature of the 337 for high end horsepower is even as cast it has very nice taper and cross section transition from the plenum to the port mating flange. This is good for power up high ( keeping the plenum charged) but i could see on a 440-470" motor its going to take more rpm to get it to the sweet spot, so with a big cam it's going to be more of a 'light switch' torque curve. On my 11.5:1 517 it seems nearly perfectly matched.