1967 Atlas oil lines?

I was wondering if anyone knows size of the oil lines and how they were originally fastened to oil tank fittings and timing case fittings for the 1967 Atlas ?
I am sure they used ferrules but not how they were fastened as I don't notice any crimp marks...

I am not sure about '67 year, but on my '63 Atlas, the oil lines coming off the manifold that mounts to the timing case are 5/16 inch OD. The original lines running to/from the oil tank were 5/16 tubing and were secured with a hose clamp (do not remember exact type). I now use 5/16 fuel tube with worm clamps.

Slick