casting numbers
 

Hello all, my 1974 911 engine was swapped, casting number is 930 101 104 do I need more info to let me know exactly what size engine this is and what it came out of ? Thanks Guys

Casting number from where?
If it the one on the side of the case below the oil return tubes it’s a 3.0 or better case. You really need the numbers to the right of the fan on the vertical support and on the flat behind the cam oil line telling what it was built for.
Bruce

Thanks Flat, this is new to me. yes it is next to return tubes, previous owner said engine was from a 1982 Carrera.