1968-74 Slant 6 head.

The trans if used for racing should have a deep pan and a high stall converter. Might have some parts value if he is telling the truth. You can see very easy if it has the deep pan, stock is very shallow. If the pan is there it would be a good indication of some good parts inside. Down side is the early trans doesn't interchange with the changed crank flange around 68.