Get out the grid and match the model to...

...the reference photo.

Overlay the two photos and plot the roof on the paper.

Plotted on the paper in pencil (with eraser).

Cut out the rear area so I can curve it to match the trunk lid.

The roof is from a '63 Mustang II concept car..

I made a boot and attached it to the tub for roof support.

I fold the pattern in half, then cut, so both sides match.

This overlay reveals several things, roof corner, taillight and trunk height.

I decided to save the tinted roof for another project, so I'm using the roof from the Mustang as an insert. I cut grooves under the roof to help with bending it.

Tip of the day: You might call these persuaders.

This is the second try with the rear glass frame. It's looks close enough. Notice I widened the taillight?