70's are good out back but in your case I'd just find a 14ff and matching front out of a k20 because they drop right in. Spring perches line up, front driveshaft bolts right up and the rear shaft bolts up with a handy little napa conversion u-joint. Heck even the brake lines are good to go.
Makes sense. Thanks.
Are you sure your U joints are OK?
Nope. I checked the drive shaft and there wasn't play in it at all. Seemed solid so I just moved on to thinking about what else it might be.