The top fin on those covers is not correct.
If you look at our covers the top fin is not broken into 4 parts but is one long fin
If the Cleveland rocker cover bolt pattern is the same as a 289/302/351 the covers will bolt straight on.
I have been told they are the same but I am not sure.
I know they are not correct, but also they are going on Shelby heads. Below are the original heads and covers.