Heater delete 67 Z need bypass hose??

[iluv69s]

So I am going 'heater delete' on my 67 Z...do I need the bypass hose hooked up? What was that for anyway?? I assume the water flows through the block from the intake to the water pump w/o the bypass hose??

I know there are documented heater delete cars from the factory. How did they come?

Thanks again.