I unhooked the cruise VSS wire to the MAP sensor hoping the cruise would just use the RPM to set the speed, but it would not work. With this new finding, it would be very difficult to change from MAP to VSS on the fly. My only KISS option would be to run the VSS and MAP to a relay on a switch so I could easily switch the wire hook up, but then I'd have to change the PPM on the cruise before I left for my trip, which wouldn't be hard since the "brain" is in my car. The real easy option would be to find a MAP sensor that would be campatable with 4000 PPM so I could just switch between MAP & VSS and not mess with the cruise at all.
Here is a video I took today: