Thought I might clear up what I meant by a "Dodge D-501" as it's an interesting bit of dragracing trivia. This might have been the first factory car designed strictly for stock class dragracing, as I am pretty sure it wasn't NASCAR legal (though I might be mistaken).
It was a '56 Dodge 2 door business coupe with the Chrysler 354 hemi. (I just did a bit of googling and discovered that a few '57 D-501's were built with the 392 dual quad engine, including a convertible with a heater and automatic for some Chrysler exec. Also, it appears I was probably wrong with regard to my NASCAR comment above.)