best hi flow ex manifold/drivers side

Robert, if you can find an A body drivers side manifold from a 72 and up 340 or 360, it is the same thing as the early 340 Hi Po drivers side manifold except that it has tabs cast on top of it to hold a heat stove for a pipe running up to the air cleaner. It has the same 2 1/4 outlet as the earlier Hi Po's. They are usually cheaper than early ones. There's some for sale on here, but I suspect they are 318 manifolds instead of 360. The 340/360 ones I'm speaking of have a flat flange outlet like the early ones. The ones advertised have a coned flange like a 318 A body manifold.