Unfortunately I had a phone issue and some of the photos got deleted, but here is what I have.
The front is made from house insulation left over from the Thunderbird (its great for moulding) I had previously shaped it (photos lost) and this is the fitting.
I had made a mistake with the angle on the top, so I will have to do some re-shaping, oh joy.
Now re-shaped, all looks ok. Lots of expanding adhesive to hold in place before fiberglassing.
Pop the dorsal fin on, and see what it looks like now. Looking good.