Hello all. I bought a 77 Cutlass Supreme. It has a 350 engine with A/C. The previous owner re-routed the heater hoses due to the heater core leaking. I replaced the heater core but now I need to replace the hoses as they belong. I see there are 2 sizes here. Any help or pics would be appreciated.
Thank you.

 

5/8” runs from water pump to heater core inlet the other hose is 3/4”