Headers with three speed on the column

I have a ‘67 with a 6 cylinder and a three speed on the column. Hoping to swap in a small block, but want to keep the trans and column shifter. Ideally I’d like to find a set of stock exhaust manifolds, but I haven’t found a good set yet. Just wondering if anyone knows of a set of headers that would work with the three speed manual trans and stock column shifter in case I can’t find a set of manifolds.