Crankcase machining ???

[Austin in the Shed]

I've just cut up a scrap crankcase as I want to see if I can match a 7 gearbox to a different engine.
It's amazing how good the casting quality (Die cast case)and accuracy of the machining of the original cases was.
While a new casting may have a little bit more metal here and there,the long oil gallery for instance can go badly wrong .There are the oil gallery holes marked too which go from the oil pump to the top of the case,not a lot of spare metal there either.