Our wedges are certainly great engines. But the hemispherical combustion chamber that allows for a better valve arrangement is simply much more efficient. And when taken to it's logical extremes, cannot be beat. That continues to be proven over and over again. Any mod or improvement to a wedge head can be trumped by modifications to a Hemi head. The only times that a wedge head wins is when a Hemi head is saddled with half measures.
I'm not smart enough to explain why but I remember Monte Smith always mentioning the Hemi was best suited to boosted applications. For N/A or on spray, a canted valve style head with symmetric exhaust ports was the best option.
