You may find these Gates preformed hose sections handy.
The larger is 22147. 1-3/8" diameter and will provide two nice 90* segments, one with a convenient offset tail. They have worked well for me making connections at the under car pipes in lieu of some of the short pre bent SS sections.
The smaller size is 28471. It has a tight preformed 90* end that is perfect for the tight 90*s coming off the heater pipe nipples coming in/out of the cabin.
As long as a 28471 appears, it is not quite long enough to make it all the way to the engine nipples, so here is your chance to install shut off valves in the heater lines to isolate the cabin from the engine. Nice in summer to help your A/C by keeping unwanted heat out of the cabin. And, later on, any issues within the cabin portion of the system (heater valve, rusted out lines) can be addressed without draining your entire cooling system.
