The 68-70 GTO's all had the same style hood.The Ram air hoods had the bracing trimmed to clear the components of the upper ram air pan. Ram Air cars had plastic scoops that were open for Ram Air. The non-ram air cars had closed scoops that were cast out of pot metal. Hide-aways were an option on 68 and 69. Check the rears, you note 12 bolt for the 69 and 70. Pontiacs had 10 bolt rears in those years unless it was a 70 with the 455 engine option, then it got the 12 bolt rear. The 69 GTO you listed in your post would be my first look since it says "WS 400". The WS code is a 400 Ram Air III engine, it may be a 69 Goat with Ram Air. On the passenger side of the timing cover you should see the last six digits of the VIN on the engine block. Good Luck