So, I unknowingly bought a pre 67 action with a mcgowen barrel on with only 4 rounds down it, which is why I bought the gun. The guy said he had a friend help him install the barrel. The barrel has not had any machine work done to it and the bolt looks like it is original. From what I read you have to change stuff to make it capable of swapping prefit barrels.

My question is what all is needed to be changed on this pre 67 action to make it work with pre fit barrels? After doing some research I am now glad I tore the gun apart right away instead of shooting it.

I attached some pictures of the original barrel and the bolt.





Any help is appreciated
Thanks,
Michael

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