68 park light question

[mightymouse]

i just received ( suppost to be a left and right N.O.S. )parking light assy. for a 67-68 c 10 that i got from e bay but i don't see a difference between the two. i thought there was a difference.both housings have made in USA and have guide1t and sae :67 and both lenses have guide 1TB and sae ip67 and either lens will fit either housing. can anyone tell me if these are the real deal . i don't have anything to compare them to I'm trying to gather parts to swap from 72-to 68 thanks...johnny