Not sure about civilian Connies but the Navy version (WVs /C-121) has the real thing at Pensacola at the National Museum of Naval Aviation. Their technical manuals collection likely has the NATOPS for the aircraft that should have a lot of what you need. They went through who knows how many modifications and versions and the one there was an EC-121Q atthe end of it's service life.
It still will not be a real simulation because of control feel etc but you can get the procedures, speeds, MPs, prop RPMs etc right. Check out
www.naval-air.org/education/tech_mans.asp.