Off Mopar Topic. 1973 Cadillac Hearse Question

I've been having some resistance trying to find info on a 1973 cadillac superior hearse. I've got the vin decoded but it still doesnt give me the info i need. I want chassis info, body info...the vin says its a 'short sill cowl' body type but google gives me NOTHING on that!!! Anything will help at this point. Know any good forums or people that have restored these? It's the same body as the Ecto 1 from ghostbusters

-TheOriginalDart

P.S Just rebuilt the top end on my 69 273 dart!! Runs smoother than sap from a tree!!