General '67 4x4 rear axle questions

[bass]

Hi All,

Have a somewhat odd project that brought me here. I am building a *trailer* based on a rescued back end of a '67 4x4 1/2 ton.

The trailer conversion has already been done, so all I really know is what I was told - 1967, 4x4 (has leaf springs, not coil), and that the original truck was a half ton. I am assuming it was a C10???

Next week I am going to tear down the axle to make sure it's in decent condition. Plans will include checking and repacking / replacing bearings.

I have two questions:

1) does anyone know if the bearings are repackable or if I just need to replace them? If replaced, do I need a machine shop to press them back on?

2) Does anyone know what the "standard" number of leafs is in the leaf springs? One of my springs has (I believe) 3 leaves in it, the other has 4 leaves, so the frame is not riding level right now. I'm trying to figure out which springs are not stock, so I can replace it. Along those lines, what years had the same axle / spring set up... could I get away with JC Whitney springs made for "1973 - 1987 C/K Pickup"?

Any help would be greatly appreciated.

TIA,

-- Bass