LOL! I see the confusion now.

I have a 36, the grill goes below the radiator, the catch can is visible to me through the lower part of my grill (most won’t see it is there). The catch can runs at a little over half full, my chrome recovery tank is used to fill the catch can and take any expanding fluids the catch can can’t hold above the half full level.

The radiator appears to be real happy now (or is that me), anyway, so far it has worked even in our recent heat wave with the A/C operating.

Thanks all for your concerns, I appreciate your helpful thoughts.