Yes the vinyl roof is long gone...most of them fried by now. I was lucky with mine, being a light colour it's lasted better.
Looks like the original round speedo was replaced with a strip one and a panel fashioned to fit the dash.
A good omen for your project Richard...if a round speedo can be easily replaced with a strip one, vice versa also applies...lol
It may have had a motor change from 1600 to 1500 or more likely it's a 1600 that's been described as a 1500, as they look exactly the same.
Of course the giveaway that it's an Alpine are the twin round headlights...that's not an easy conversion!
You'll also see on the extreme right of the interior photo - there's a heated rear window switch in the lower dash...that was a luxury item in 1976, not on the base model...tightfisted Chrysler again...haha