To my knowledge, Clifford only sells two intakes. One open plenum that you buy an adapter to fit your carburetor and a dual Weber intake. Both of which are water heated. At least, I would think the dual Weber intake is water heated. I know the other is.
I think the Clifford I had the water box was cast in. I never used the intake. That or the Offy. There has been several models of the Clifford 4bbl. One had the bosses with the water box. One didn't have the bosses.