We also have a 1964 Chris Craft with twin 283's. I enjoyed your description of our rebuilding project. Sorry I do not have an explanation or advice on your oil and oil pump mystery. I do have a question on the water pump. We have a overheating left motor and are not getting good water flow through that motor. Disconnecting the pipe from the water pump to the motor gives us good flow. It seems that the pressure is too low. What should the pressure be on the water pump? Any other advice will be appreciated.

Regards,