[BCA]

I looked in the Chev Major Assembly book. The C15TA engine has a unique part number - 5266460. There is only a reference photo of left side with distinguishing features noted as: fan blade tips square, oil filter mounted at front of cylinder head on left side, generator fan and pulley separate, 6volt generator, no air cleaner on carburetor, equipped with 143 degree thermostat. It is a "second type engine with deep oil pan. WA very extensive charts list dozens of part numbers for individual components.
...Brian