I thought the Taunus was the German equivalent of the Mk3/4/5 Cortina?
I think these are just casting numbers, rather than any positive identification.I found a pipe in the bottom of the engine bay that fits between the little box on the side of the block and the side of the air intake on top of the carb.
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There are some numbers on the top of the head (7E10)
And (T9) on the side of the block by the distributor
I defiantly think it's a carb/fuel problem as when it is going it runs really smooth
A lad on a motorbike once flagged me down in my old Cortina to tell me,because of the amount of smoke, that my engine was on fire!That's just a breather pipe from crankcase to air cleaner - it might alter the mixture by letting in more air when not there. ( on my Mk 1 cortina it used to emit smoke like mad - it was open to air and hung down)