Possible oiling concerns

Mine doesn’t have a flat. Instead, mine has the small bolt hole on the one end. But instead of facing toward the valve springs. The oil holes were facing toward the push rods. But I have a bigger problem now. I crank the motor without the rocker shaft in place and I don’t seem to be getting any oil up there to begin with
while the rocker arms are off the shaft, it would be a good idea to use either carb cleaner or the probes mentioned above to verify the oil passages are open.
And also look for the small flat on one end, that would be a good reference point for next time.