Don't all Early A centerlinks have a drop, whether slant six or V-8? My 1964 slant has a drop, but not as much as for a V-8 so it won't clear a V-8 oil pan. The difference isn't much so hard to judge from photos, use a ruler. I have read that many 1966 slant-six had the larger drop of a V-8 centerlink, probably just to use up parts.
