Who's idea for the 68' Hemi Dart

Good Question With the expansion of the Super Stock Division in the NHRA in 1967, each manufacturer was out be the 'Top Dog'for 1968. Chevrolet was supposed to put together a 1968 Corvette Super/Stock car with an All-Aluminum 427 rated at560 Horsepower. Installed in the 1968 Corvette with an approximate weight of #3100 lbs. The Corvette would have had a Weight/HPfactor of 5.53 Wt/HP putting it in the new SS/A Class for 1968. Ford was in the process of putting together a 427 SOHC in the new 1968 Mustang GT. The 427 SOHC was to berated at 600 HP. Installed in the 1968 Mustang GT with an approximate weight of #3200 lbs. The Mustang GT would have hada Weight/HP of 5.33 Wt/HP putting it also in SS/A. Mopar, to counter Chevrolet and Ford's effort, went with the 426 Race Hemi in the light A-Body {Barracuda and Dart}.The Race Hemi would again be rated at 500 HP, just like the 1964 and 1965 Super/Stock B-Body cars. The #3050 lb. lightened A-Body cars would have a Weight/HP factor of 6.10 Wt/HP. These cars would be classed in the 6.00 to 6.99 Weight/HP range, or SS/B. The Head's of Mopar's Racing Division {Dick Maxwell, Bob Cahill and Tom Hoover} had Engineer - Bob Tarrozi designthe project in November 1967. This is where the 'main ingredients' started.