1960-1962 chevy and GMC are the same seat 1963-66 chevy are the same, but as 64fleetside mentioned the 63-66 GMC seats are on slider rails. i have a middle seat out of a 60-62 chevy/GMC that i redrilled two extra holes so it will now bolt in to a 63-66 chevy also,and i should have a 63-66 chevy Middle seat here buy next week. correct me if i am wrong.
