Looking at a Trans for Victoria need input.

your driveshaft should be the same ....904 and 745 are the same length.

i am not sure how different a 66 is from a 68 but i have all the auto linkage and apparatus from a 68 dart....from when i went auto to 4 speed

if 68 parts would work on a 66 ....it would be an honor for Victoria to share parts with Natasha (my 68 dart)