I was a 13 year old kid when these ads for the 1956 Dodge D-500 package came out and they sure got my attention and helped to make me a Mopar fan. IIRC, the D-500 was a Hemi HP package that the ad says could be added to any Dodge model. The specs in the ad only talk about a 260hp "Aircraft type V-8" as "Hemi" was not yet a common term for the motor. What really got my attention back in those days was the ad referring to "the car that whipped all other cars in acceleration at Daytona Beach and is racking up victory after victory on tracks all over the country" Another '56 D-500 ad, this one placed in "Motor Trend". I don't know about calling it a "Bomb" but I did like "these days more and more of you guys who know and love cars are 'talking up' the fabulous Dodge D-500 and no wonder" ........."In official Nascar acceleration tests at Daytona Beach, the Dodge D-500 licked all cars - regardless of size, price, or horsepower".