Say Why Blower Manifold??

I apologize if this is not posted in the correct area. I am still researching parts from my FIL and can not find much on this. From some reading, some say it is rare however I don't know. I would like to know what it is worth, I am going to Spring Carlisle. Please this is not a for sale thread if you have any specific questions please send me a PM.

Thanks for the help.

View attachment 1716226345

View attachment 1716226346

View attachment 1716226347

View attachment 1716226348

View attachment 1716226349
Big block Mopar, not common but they are out there. See them anywhere from $1200-2500.