What are the most likely Donor vehicles for the A 500 4 speed automatic?

I'm thinking of getting a couple A 500 4 speed automatic trans for a couple of project cars. I like the lower gearset these have for 1st gear.
I don't recall if these came with a lower 2nd gear ratio than a 904.
I was thinking that these were probably commonly found in 318 Dakotas and Vans. I did help a friend pull one from a Dakota a year ago.
Do they also come in the V6 models?
I need a transmission for my 67 Dart and another project I may embark upon.....