Small block Heater hoses different diameters?

[Dibbons]

My 318 '72 SSP shows a drop of coolant inside hanging from the heater box, so I am thinking about bypassing the heater altogether. Are the two heater hoses different sizes or is that just my imagination? Thank you.

 

[72RoadrunnerGTX]

With or without A/C?

 

[Dibbons]

Without A/C.

 

[72RoadrunnerGTX]

Non A/C Heater core has one 1/2" hose nipple and one 5/8" hose nipple.