No sadly pipe clamps/hose clamps wont work.
Whilst you are spot on thereabouts with the 35 psi on the low side, when working.
When the system is off - the pressures equalise - on both low and high side, and on a 40 Degree day with the car parked in the sun the equalised static pressure can rise to 120 psi or more.
...........so I am afraid it will have to be proper screwed or crimped joints.
Ladas

