Nate, if '1076 were original here then the hoses from the heater core were just straight--probably better to use formed (90' bend on the heater core end) hose instead.
Where I remember having problems was between the Engine and the Y-adapter (this picture '1046 again). As I remember the stub hose decreased radius to something I had a lot of trouble finding...But everything else is generic hose, nothing special---Lee