I bought them for a 1975 Chevy 454 pickup. The fan cover on my truck is 3/8" thick and these clips are slightly smaller than fully open. I opened them to fit the sheath but they opened too far and when I squeezed one of them it broke. In the picture they are open from the side of the case but they were closed, they didn't slide on the case past the little notches so I opened them by pushing inwards. They seem to be similar to others I've found, so the Camaro/Chevelle/Nova covers are obviously thinner. Measure the thickness before ordering. I've ordered a few from LMC Truck and they true to size. Below.
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