im sure they will..check out 67-72chevytrucks.com.. theres alot of useful info on there.. and a really good parts forum.. but yes im pretty sure they will fit, but you may have to change the hood latch..to a 67-68 latch
Definitely check out 67-72 but if I remember right, the fenders are different and you have to swap those with the hood since the front end is different. I know I've seen the info on 67-72chevytrucks
fenders are definitly different. if you want the grilled to to you need a radiator support to as the lights on the later models are about 2 inhes higher. hope this helps,