To answer some of "340Plot"'s questions: No not all R/T Challengers were V code or 440 6 pack cars. All R/T Challenger's vin start with two letters = JS followed by the body style = 23, 27 or 29 - then the year "0" for 1970 and then the engine code = N for 383, U for 440 mag, V for 440+6 and the...