Driveshaft orientation, '72 Duster 4 speed

Thanks for the input gents. I measured the width of the ends and they're the same, around 2.9 inches so that's not an issue. I'll go with it to the rear.

And that whole dropping a driveshaft isn't unknown here. Had it happen in a '73 Challenger at the transmission and while it was only "city driving" the *** end of the car still popped up a couple feet before it slammed to the ground at a dead stop. Lucky I wasn't in traffic...