Howdy Back:
The only casting we've every found on a 144 is a C0DE. It has 1.467" intakes and 1.266 exhasut valves and an intake tract vvolume of 850 ccs.
The C1, used in the 1961 762 model years has a volume of 890 ccs and intake valve size of 1.52". Exhaust measured 1.266".
The key will be the size of the intake valve.
Adios, David