737 main instrument panel...a beauty, with 4 inch airspeeds.  This was removed from a sim built by BOEING. Close examination will show that they started the interface process, but didn't complete the task.  There are many indicators that have had drivers installed, but to what degree, we cannot say.  You'll have to use your laser eyeball to determine exactly how many million man hours they have already invested.   It has to be MANNNNNNNY hours, and a mile of wire.