I`d rework the latch on the hood to be 69 style, but yes you can put 67 style latch mechanism on the car...BUT, If I remember right, 67 didnt have the 'safety catch'? So it may be better to go w 69 style... its the square "hole" receiver in the hood that is either bolted in there or sometimes welded in....(mine is both , one side bolted, one welded...) see if you can get with someone who has a 68 or 69 hood to compare to...I think Brent Block is up there close to you in Edmonton, and if I remember right he has a 68...?
email me for his email address! mine is bsefeldt@mhinc.com and I`ll give it to you, ...if you dont know him already ,you should!