The '69 also has squared wheel wells, the '67 and '68 camaros have round ones. The '67 and '68 are pretty much identical, except the '67 has the little vent windows on the front of the door windows, the '68 does not.
I had two '68's when I was in my late teens. One was rusted out, but had a 327 and a Muncie 4-speed (rock crusher) that was used to replace the anemic 307 and 2-speed Powerglide in the one with the good body. It turned out that the 327 was also a factory 4-bolt main engine, which I discovered was relatively rare.
Wish now I had kept the car...sigh.