Another header ? for smallblock

The W2 heads/headers have a different port design, D shaped as opposed to rectangle-ish. If you get the W2 headers, are they going to seal? If you have W2 ports and get standard headers, there is a huge step right out of the port that can stall the velocity of the exhaust pulse. Get the one that fits would be my choice unless I missed something. W2 gaskets are not hard to get.