Offenhauser dual 1 barrel intake with 2 new Daytona one barrel carbs. 9" original air cleaners with custom decals I created. . . .
Offenhauser has been making that manifold for decades
There was a three page article about this then-new intake in the January 1961 issue of Hot Rod Magazine, titled, "Dual Intake for Slant 6's." This pic was on the lead page: