I have a set of the long tube Hookers on my slant in the 68 Barracuda, that set of Hookers has the provision for the carb heat, the Clifford intake manifold I am using also has provision for water heat, neither one is in use, as I am running MPFI don't need the hot spot below the carb. If I was running a carb or throttle body on the street or track, it would have a hot spot below the carb.