Okay, Firstly to identify the block you should prepare an mechanic’s extension mirror and a flash light to lit the area and look for the stamp marking of your car designation, for example B10 3.5/1 which would be located on top the flat surfaces of engine block where starter motor will be bolted to the opening on engine block.
Secondly, after determining that the block is Alpina, know we should see if the engine’s head is Alpina as well, reason for this is that many times happened that the head must be rebuilt due to over raved engine, etc…., and many mechanics would do the core exchange for a already rebuilt head or other reasons……., so we should know that.
Thirdly, to identifying an Alpina head, you should look for a stamped 5 digit # on the side of the heads facing up just bellow the valve cover between the distributor cap and the breather hose on valve cover. And if you sent that # to Alpina it should correspond with car that they used that particular head.
Finally, the exhaust should have Alpina stamp and part# on headers, down pipes, on catalytic converter, and the silencer as well as the muffler.
The prepuce of this exercise was to provide as much information with the help of other members and making sure when an enthusiast is looking for an Alpina car to purchase, so they could easily identify the real deal.
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