I removed the radiator on my '78 P30 to have it re-cored etc. When removing the hard lines from the transmission to the integrated cooler in the bottom tank, one of the lines sheared off right at the fitting, so I will need to replace at least one of them. I'm sure in a pinch I could use some rubber lines and hose clamps but the only semi-official advice I could read on this was in the Chevrolet Motorhome Chassis Service Guide on line 205.

Is anyone familiar with this standard/process? Any tops for how I can safely replace these lines per GM's requirements?