SS EMBLEMS ON 68 YENKO CAMARO'S

[BEAUMONTBILL]

I have noticed several pictures of 68 yenko camaros and the placement of the yenko and ss emblems seem to vary.
Some pictures show an ss emblem on the grill some do not.
Some cars have an ss emblem on the fender with the yenko emblem above. Other cars seem to have the yenko emblem with no ss. Is there a reason for this that i am not aware of? My 68 that i am restoring seems to have the holes
for the ss and yenko emblems on the fenders but had nothing on the grill. Any thoughts? Was every 68 yenko an ss?