My '69 had the basic/more common caps (first 2 pics) and they were Fugly.
That was one of the first parts to go in-place went a slick set of R2 rims.
They did offer a deeper cap (last 2 pics) which I wasn't aware of and might have used if I did.
They have an excellent deep dish appearance that I could have lived with.
Both caps/disc are listed for 69-70 GP.
http://www.hubcaps.org/grandprix.html
__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.