You just gambled the cost of a replacement engine using screw clamps v. Manufacturer's hydraulic crimping...
Yes, Gates rates the working or burst rate at 400 psi, but that's with their approved crimping devices.
Mercedes Benz used aircraft style clamps since the 80's on their vacuum+ low pressure fuel hoses....from personal experiences, the new world hoses are not the same quality from the OEM 1980 era ...the replacement hoses would further compress, harden and the clamps couldn't hold a seal very well. I spent too much time on the side of the road, always at inconvenient times tightening clamps, shortening hoses, or replacing loose sections of hose.
My fuel delivery failure is peanuts compared to running out of motor oil.
If you want to live with clamps, upgrade to fuel injection / aviation style clamps +. retorque the screws when you change the oil.