SB2.2 Has symmetrical intake ports but the conventional style exhaust ports with the center 2 being close to each other.
The Dart Little Chief is, I think, a 11 degree head and has symmetrical intake and exhaust ports along with canted valves similiar to the Ford heads. This design helps eliminate the hot spots that the older style SBC heads have in the center of the head and is a major advantage when trying to keep the head gaskets on an ultra high hp engine. They can flow over 400 cfm and make well over 2000 hp on a small block. But they require a sheetmetal intake, special lifter bores in the block, custom roller lifters, custom rocker setup and so on.
The BD 2000 from Brodix is also a symmetrical exhaust port head but more reasonable $$ than the Dart.
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69 Rally Green SS Camaro
My cruiser
87 Turbocharged Buick
Drag radial car
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