8 1/4 rear for 68 dart

69FBCuda said
Not Mine, the whole 9 yards, springs driveshaft hubs the works

1973 74 75 76 Mopar A-body Dart Duster 8.25 8 ¼ Rear End Axle Assy w/ Sure-Grip
1973 74 75 76 Mopar A-body Dart Duster 8.25 8 ¼ Rear End Axle Assy w/ Sure-Grip | eBay

Wow, that's a super deal! I'd be doing a road trip right now if it were a little closer. That's not SBP 4" wheels though, like what you were looking for.