There was just some confusion with the model designation. Not a big deal, but we sorted it out.
As to the axles, no, the K20 did not use dana 60s. The front would be a Dana/Spicer 44 closed knuckle, the rear would be an Eaton HO52. While the front is easy to get gears and other parts for, the rear is not. There is also issues with brake improvements (disk fronts) and strength. Whle the closed knuckle axle is very strong, the open knuckle (disk brake) versions are stronger. This is primarily due to the stronger spindle to knuckle mounting. The open knuckle uses 7/16" studs instead of the 3/8" that the older axle uses. It also has a tighter turning radius. For what hiem30 wants to do, brake upgrades are a must, easpecially with the larger tires. Personally, I would opt for the kingpin style Dana 60/ GM 14 bolt full float out of a '79-'87 K30/'88-'91 V30 1 ton, as those are about the strongest axles one can get without going to custom built axles.
