I mean no disrespect to the seller. I'm sure they love the car and spent quite a bit of time on it. The seats definitely aren't period correct, but those could have landed in the car at any point in time. As far as the look, it's not my cup of tea. Don't get me wrong I love the Alpina stripes on late 70's through 90's Alpinas. I like the E9's that I've seen with Alpina stripes. The color combo of the dark blue paint with the CSL trim and gold stripes does nothing for me. I'm a huge fan of Alpina everything but this car evokes zero emotion for me.
Getting down to business, there are two things that I don't like about this. The first is that the Alpina Plaque does not appear to be period correct. It looks like a 80's 90's plaque. These plaques are thicker with a 3D beveled edge. The e21 B6 plaques were thin aluminum much like our VIN plates. I suspect that the conversion plaques were less VIN-like, as they didn't have Alpina's chassis number on them, and likely were screwed to the dash. Given that importers and dealers handled Alpina conversions, I'm not sure how much info you can gleam from an alpina plaque. It's easy to hunt around and compare as there are plenty of e21's still rolling around, both factory originals and dealer installs.
E9 Plaque:
Period B6 plaques:
Later Plaque:
The other thing of note is that he Zenith Pierberg DL fuel injection is different than that of a 1976 B6 2.8. This injection only lasted a short time on the B6. Given that this car was converted by Alpina in 1976, why wouldn't these parts be the same?
E9 Fuel Injection:
E21 B6 Fuel Injection:
1981 B7 Turbo Injection (same as 1976):
To me, it looks like that injection is an earlier unit found on Irmscher tuned Opels. The fuel manifold is clocked differently but it otherwise looks damn near identical. See the 1972 reference in the magazine article. If Alpina proper did this work, again why not use the same unit which fits the bay much better:
An interesting read on Alpina plaques:
https://www.alpinac1.com/single-pos...dash-plaque-the-mystery-and-allure-of-Alpinas