SOOOOOOO, you are both saying that the '64 GTO could be found with the largest, most powerfull engine that Pontiac made, HHHHHUUUUUMMMM. Go back and read the article about the Ferarri GTO VS The Pontiac GTO. Trickery run's deep.....
In conclusion, the '64 GTO
could be found with the most poowerfull Pontiac motor availiable, thanks for the help guy's....
PS: Champ, you are correct sir. The #'s I posted were for the '65 GTO, not the '64, my oversite....but it could still be had with the 421...LOL