Curious what style clamp was used for the coolant overflow hose where it attaches to the radiator fill neck on a 1968 442? Some type of spring clamp I would guess, and certainly not the hardware store worm clamp I have on there now.
Thanks.

 

It looks like nothing at the top and a clip near the bottom:

 

^^^This. The hose was a friction fit on the nipple. There was no appreciable pressure in the hose since it vents to atmosphere when the cap overflows, so no need for a clamp. Probably saved half a cent per car.

 

If you want, the smallest black zip tie would be a nice clip. Or, a spring clamp. Joe is right, though, you technically don't need a hose there, so it is not critical if it were to fall off, as it just makes a mess.