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JHarsh,
Your profile indicates you have a 1966 - if it is a 2WD then all the parts you need are available from numerous aftermarket suppliers (the usual suspects) and the rebuild is relatively simple. I have done two 66 2WD columns but cannot speak to a 4WD column (do not even know if they are different). There are numerous threads here that were helpful so a search will give you good info. Good Luck.