This is fun!
Mike, of course, however:
- the casting number - we hear it is stamped on the block - not sure where it is for now
- I think I see Tauschaggregat plate on the picture right next to number field on the block
- the last 5 digits of the engine number is not factory stamped, it may not be that engine, it may be the number of the engine that was replaced and this engine (replacement engine) may be later engine with oval shape of the chambers; yes, I know it would be silly to stamp the engine number like that but only if installer realized the chambers changed; or someone might have wanted "matching numbers" and would kill for it
I am not sure if anyone would attempt screwing oval head to square block - the difference is very visible, I am not sure how likely it is.
As for FIP - well, 1000 scenarios here...