Thanks Steve, Cliff and Carl. In 1974, when this style was new, I remember thinking they looked too square and I didn't appreciate all the vertical lines - but they've grown on me. I'm still not sure if this is a 77 or a 78.
Just a quick update. I got the grille and rear bumper detailed. A little sloppy in places but it might be about as good as I can get it. I have two of these kits and noticed that one had the sun-roof glass and the other not. I wanted to use the piece with the sun-roof but it had a cracked rear window so I removed the rear segment and replaced the three rear windows with clear sheet. I have also found appropriate mirrors in my parts box - the kit is an unassembled promo with 20 pieces (that's including the tyres) so it didn't have mirrors. I will probably now construct poseable steering.
Thanks a lot Dave and Mike. Mike the clear (and black) is out of the can and if I could take a more in-focus photo you would see that I have a fine-ish orange-peel in all these surfaces. I've never been able to do it any other way and have simply learned to polish them out - although that sometimes doesn't go too well either; the Coupe DeVille has a couple of spots where I've polished through to primer and I've managed to make it worse trying to touch up. Oh well. I've just ordered some 2K clear from Standox in Germany in the hope of overcoming such problems.