Pull the head and do a full teardown and cleanup. Chances are the rockers can be reused, but it's going to take more cleaning than can be done with the engine assembled. The valve springs will definitely have to be trashed, not sure about the spring retainers.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!