What's the rule on front fender swaps?

[67chevy1series]

Originally Posted by Fesser

FWIW, I bought the GMC fenders before I got Rick's answer. I needed 67 Chevy fenders but was okay with the idea of 68's because someone already put later rear fenders on my 67 stepside. I don't know what year the GMC fenders I got are, but they look exactly like 68 Chevy fenders (not sure about the trim holes on the front edge).

look at how the holes for side trim are if they go down about an inch below the body line then it is probably from a 69 72 if it is closer then it is a 68 gmc fender