W2 dual pattern head header options

So I picked up a set of W2 heads pn#p4532693 for my 71' Demon that have the exhaust bolt pattern holes for both the standard small block exhaust and the W2 pattern. I see TTI sells a nice header for the A-body with the W2 flange but I hadn't heard if anyone had any issues with just using the standard small block flange on these heads like a set of Doug's. I am only leaning toward the standard type headers because it gives me more options for the future. My really only concern is that the standard header ports are in a slightly different position than the w2 ports so I see some flow interruption there.