What are the two cross-sectional areas (square inches) for the 235 thermostat housing, Deve?

- the size (sqare-inch area) of the opening in the head where the thermostat housing attaches
- the size (square-inch area ) of the opening at the outlet in the top part of the thermostat housing (where the hose attaches).

They might help people understand why the 261 has a different housing.