Picked Up A 70' Dart Swinger

we picked her up without an engine but she came originally with a slant six & auto trans

Ya want to find an 8 3/4" with either 742 or 489 as the last 3 numbers in the center section casting number. Here's a good link http://www.moparts.org/Tech/Archive/axle/21.html

The first time you plant the throttle with that 7 1/4 will be the last and ya may even kill off several small species of furry little animals with all the scrapnel.

Terry