hello, my American friends, I am sorry for the translation, I am French and I do not speak well your language, I seek much d' infos on Ford tbird, j' have a tbird of 1968, 4 doors it very beautiful but is consumed much fuel c' are one 429 Ci, I wanted to know if it were possible to put at the place of this engine an engine of 215 Ci, so yes which and which would be the modifications has to make, by advance I thank you for all information, my friendships of France to your beautiful country