valves for small block 587 heads

i was looking around on those.. im not sure how well i trust like a local parts store .. **** they want to know if you automatic or manual just for headlight bulbs... would it be worth it trying to clean up valves i already have laying around? what decides whether a valve is good or bad
That's just how their computer programs are written. Like all the online parts sites, you answer questions about your car to get to the correct application.