During the 67-72 truck range there was only 3 different style grilles, 67/68...69/70...and 71/72, those grouped years had something different and distinguished about each group.
Heres an 67/68...
Notice the hood doesnt have as much definition and the drill has a band that is skinny and molded into the fenders.
Heres a 69/70...
More defined hood and fender, thick aluminum band that goes across the grill.
Heres a 71/72...
notice same style hood and fenders, different grill known as the "egg crate" style grill (my favortie personally). The blinkers got moved into the bumper as the 69 grill had them in the grill band.
Theres a way to tell each difference between the year groups but I dont remember, I do know that in 72 they moved the rear view mirror from the inside cab mount to a windshield mount in 72.
......and I still think you guys are gay and if you dont like my pictures you can still kiss my white ass.