318 to 225 OE Style Heater Hose Clamps

The lower hose on all (?) small blocks is 1.75" ID. The lower hose on slant six's (all?) is 1.5"D.

The heater hose on my slant, SB, and BB are 5/8"D. Ditto for my Mercedes 300D's and minivans.

Not sure why you want to use those "Corbin clamps". I suspect most use them just to look original. Otherwise, I think they are inferior and only used for speed at the factory. Chrysler used those (flat style) on the power steering cooler on my T&C, which was a tow package upgrade (stealer installed?). Mine leaked, as it did for most owners. Indeed mine shot a spray up at my pump way above, so I thought that was the source and spent a lot replacing it.

I would think stainless steel screw clamps would look best and be superior. Even nicer would be the upgraded type with a smooth 360 surface and an outside clamp bolt, as used in "fuel injection" clamps and turbocharger intakes.