Firebird Subframes

I've heard that 67, 68, and 69 were different. Finally got some pics of the 67-68 differences

67 - 2 holes for core support, 68 3 holes

68 sheetmetal "tower" outside spring hole, 67 has tab with hole

67 - 3 holes on outside or frame horn, 68 4 holes

67 3 small holes between body mount and steering box, 68 4 holes