I have a chance to trade for a set of 80s (not sure exaclty)Dodge Dana 60 and 70 rear with 4.88 gears. This one is supposed to be the open knuckle kingpin style, just wondering what it would take to swap that under my79 k5? I've got an 8 lug 10bolt now thats set up for crossover, so I was workign on that, am in the process of 52"spring swap I'n not too concerned about the rear 70, I have a 4.10 14b that I can swap gears in, or swap the gears in the 60. I would be getting a VERY good price on this, but is it worth the effort?