Dropping the rear of my 64, what to use.

Oh no, you just Pimped my car!!lol....my son just saw your photo shop pic, he's gonna try to get me out shopping for wheels...he likes it!!ha,ha

Sorry for "pimping your ride". I think 17s would look awesome on your car.
Maybe if you and your son get some wheels before me i can follow your lead on back spacing and such.
Also, i think 6 leafs were common for convertibles because of the extra weight from the top. The rearend i gave to my friend had 6 leafs (my 64s a convertible).