Look at the vin plate on the engine side of the firewall. There should be an original BMW plate x'd out an an Alpina plate next to it. If you thought Dinan bmws were bad, you don't know about alpinas. Alpina basically took new bmws and modified so much they were issued new manufacturer #s, hence the double plate found on most.
We're I to find such a treasure, I would try to restore it to Alpina new condition. Awesome score... There's a reason they made it a track car.
“Coming of age in a fascist police state will not be a barrel of fun for anybody, much less for people like me, who are not inclined to suffer Nazis gladly and feel only contempt for the cowardly flag-suckers who would gladly give up their outdated freedom to live for the mess of pottage they have been conned into believing will be freedom from fear.”