Will it make it break whether you buy a project or completed car? I personally don’t care a whole lot but some do. For instance one of my cars does have the numbers matching engine but the transmission isn’t. The story I got was that when the car was four years old that the transmission was grenaded at the track and they put another in it out of a junkyard. Does that make that car less desirable? How much less is that car worth because if that?