Update on the oil line failure. I removed the line, cut out the affected section and put the boroscope inside and found the line had split internally. The hose is rubber with wire reinforcement and nylon lined.
I believe what happened was that when tightening the connection to the oil pump the line twisted and because I had a heat sleeve over it I did not see it. So it would seem that the spec in turn of radius for the hose is ok but any torsion along the longitudinal of the hose is a problem.