I can’t help you with the casting numbers,but if the number stamped on the crankcase flange is read as 86284,it would be a 1928 motor crankcase.That would make it a P40,I believe,and likely a South Bend motor.According to my parts book the P35 and P45 had different carbs.The P35 carb is shown with P35 cast on the carb.Also the list shows the P40 having a release charger,but that might have just been the later ones.That’s all I got.
