Rebuild 56 Chevy rear end (not 4x4)

Any idea what the ratio is? My 55 had a 3.50 when it was still a 10 bolt. If yours is a 3.70 or a 4.10 I bet you can find somebody locally to trade for a 3.50 or 3.36.
 
You might be SOL on that axle, it is either an Eaton HO33 or HO35, not much of anything available for those anymore. I think you would want to put out a WTB ad on the 67-72 chevy trucks board and see if someone has a third member already geared that you can swap in. These are long obsolete. Even the later/bigger Eaton HO52/72 axles are getting near impossible to get parts for. Otherwise you will be looking to swap the entire axle out.
 
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