I couldn't speak to the factory clamp, but the PS return line is under no real pressure and can be clamped with a regular clamp generally. And I'm pretty sure that you can just replace the rubber hose if needed (I don't recall the stock one on mine, I used the donor pump and line from the 5.3, and I believe it was a spring clamp that came on it).
The PS feed line, however, needs to be treated with caution, properly crimped, etc. but I'm sure you're aware of that. Just making sure future lurkers don't get things confused.