Vc spacers
 

Hp 500 style

Need 4, rockers won't clear....

Did you grind the corners of the rockers yet? Ususally that is all it takes unless your running stud girdles. Factory HP500s come this way.

or you can do your valve spings a favor and install oilers, they would act as a spacer and provide some lube and extra cooling prolonging spring life... just a thought for you