........but I just went through this finding a tranny for my 64 Ford. The C6 was introduced in 66. The first year of the C6 had a few minor problems, and the green dot pattern shift pattern (i.e. started out in second when it was put in drive). You guessed it the first tranny I dug up was a 66, I now have one from a 68 428 powered T Bird.

ali reyadh what ever tranny you get for you Bird it will neeed to be from an FE (352, 390, 406, 427. 428), as that is the only bell housing that will fit you engine. As far as finding a C4 with a 390 bellhousing they are extremely rare. I personally have never seen one but they were supposedly made.