I've seen the actual 893 manifolds being advertised for sale on Facebook Market Place and eBay. The have the offset water neck placement, but seller says it fits a 340 LA heads car. I sense the 893 has a different bolt pattern, possible for Magnum heads or W5 heads, but I don't know that for sure. That's why I'm asking for help. I saw a Mopar HP Intake Manifold Casting chart listing the 891 as the Manifold kit # and 892 as the casting #. The further I dig, the more confusing it gets.