If its got a sunroof then its the road spec 909 version from 1989 so comes with all the bells and whistles like seam sealer etc, it was the non sunroof 909 that was basically a load of thinner panels simply welded together and nothing else.

When you start installing a few things you will spot the subtle differences between it an a 1986 cosworth shell. The advert for these shells is in my profile.