I currently have a 2006 Mountaineer V8 with the tow package, and it's served me well towing my 4200lbs ski boat. I'm looking at a 2008 Mountaineer with a V8, but it doesn't have the tow package. From what I've been able to research, there aren't any drive train differences for the V8s between the non-tow and tow packages (same gearing, transmission, springs, etc). What would be needed to have the towing capacity increased to the factory tow package figures? I know the 06-10 have a welded hitch, so I'd need to either cut off the existing hitch and have a class III IV welded on or add the bolt on version (which in my opinion) looks silly under the class II hitch. What else would be needed to retrofit?