Looking at a Trans for Victoria need input.

A member has an auto Trans I think it came out of his 70 dart he is restoring,
When I go to an automatic all I need is a flex plate, or will I run into anything that will surprise me to put this 70 model /6 auto on my 1966 /6 standard shift crank shaft.. I am sure I will most likely need a yoke and build a drive shaft ..

Thank you all for any input, he is about 220 miles away and said it drove and shifted great and looks clean inside, I will have it rebuilt if I go this rout :D