Hi Dave:
I've changed the double bend hose on the passenger side before without removing the radiator. Its not fun, but it can be done.
As for the short lower hose, that is connected to the thermostat housing. The t-stat housing is really very simple to remove, thereby easing the way towards the installation of the new short hose that connects to the lower radiator opening. The only thing to be aware of is the t-stat housing "0" ring, which can easily become dislodged if you aren't careful on reassembly. Do a search at
http://listserv.corvettemuseum.com/c....exe?A0=ZR1NET for "thermostat housing removal" and see if you come up with any tips. Good luck!