5.2 in a 68 Barracuda

Isn't the JGC's rear suspension considered a 5-link? There are 2 upper control arms, 2 lower control arms, and the track bar.

I just have a Dana 35 in the rear of my Jeep it is all iron but its still alive behind my 408 and 31" tires in my Jeep.

There are guys running supercharged 408 in their JGCs with the aluminum 44. The transfer case in those Jeeps split the power about 90/10 if I remember correctly, 90% goes to the rear. My Jeep splits the power 50/50, that is probably one of the reasons my Dana 35 is still alive.