5.2 in a 68 Barracuda
From looking on the internet at Dana 44A center sections, looks like the carrier is a Trac-Lock. I'm going to look up some part numbers and see if that carrier might fit an 8 1/4. I have a 2000 Jeep 8 1/4 rear axle with Trac-Lock in my 68 Barracuda. The Trac-Lock came out of a 92 Dakota.
I'm looking at a 78 Dodge D100 for a reeally good price right now, but it will probably get snatched up before I can get there and get it. The truck is a 4-speed which would complicate putting the magnum engine in, but from what the guy says, sounds like a car 4-speed, not a truck. He's a young guy, I had to explain to him what a "granny" gear was. LOL
Honestly, I wouldn't mind putting the rear in the truck, but the truck probably already has a stronger rear. What came in those trucks equipped with a slant 6, an 8 1/4?