[Phil]

Dave:
I have a feeling those shrink clamps wont seal your system. It sounds like you need to expand the ends a bit, and a bead rolled around the end of the coolant tubes to keep the hose on.
Take a look at Mc Master/carr, they sell lengths of silicone hose which is used with a band clamp employing a built-in liner to keep the hose from extruding thru the clamp....work very well.
If you need pre-formed silicone pieces such as 45 & 90* elbows check out some of the racing catalogs...they aren't cheap though.
Also, if you know of a shop or someone who does work on ambulances and police cruisers they generally have silicone hoses on the coolant systems, and they may be able to steer you in the right direction.
Stainless tubing is generally slippery as hell, and unless it has a bead on the ends the hoses can simply push off under pressure.
Cheers
Phil