heater hoses

[MosportGreen66]

I'm just about done with the '58 Fuelie Vette I've been working on for the last month. The heater core was bypassed when I get the car although a new heater core was installed. I'm having trouble installing the new, reproduction heater hoses. Is there is a trick-of-the-trade I should try or know about?

The heater hose in-let to the water pump is the unit I'm having most specific problems with. I've tried grease and even heat. No luck,

Thanks!
-Dan