The timing gear’s dimensions are normal, but the three normally round holes are “D” shaped, as shown.
The flywheels are of thinner cross-section and the flywheel face is 1-1/4-inch rather than 1-1/2-inch. The flywheels are also lighter, allowing a faster speed of 650 rpm. The flywheels have only one clamping bolt and no brand or part number cast on them a
The main bearings in both the block and the caps have been rebabbitted in an odd manner, with the babbitt apparently poured around a replaceable bearing insert, thus partially melting the insert. One main bearing cap stud bolt was in upside down.