OK, You clipped the picture from a three year old post of mine. I was under the impression it was a modified CUVC grille guard.
http://67-72chevytrucks.com/vboard/s...68&postcount=5
Since you alread have one you might work from that for a 69-72 unit that fits taller than the factory offering yet still looks "factory". A few cuts hould have that angled to fit very nicely.