rreplaced rack & pinion now all power steering fluid leaks at high pressure line. Any advice on tightening enough to stop leak?

 

Sounds like you need to double check the connection at that spot.
Make sure it is not cross threaded or stripped. If everything seems as tight as it should be (don't over tighten) then maybe the lines got damaged during the install?
Those little hydraulic lines can be cumbersome and scary if you think you might mess them up.
Is the leak a drip or squirt/stream?