If you search on the dimensions you'll find various options but unless you really know what you're doing it is probably smarter to have a cylinder head guy get the valves for you. From what I remember those are just 2.19 x 0.3415 x 5.344 valves. I'm not sure on the shape of the head or a margin width or things like that which is why you usually want to work with a cylinder head guy. But if you search on Summit you can find BB Chevy SST valves for roughly 1/2 the price that Indy wants. However, if you buy the severe duty valves the prices is basically the same as the Indy price so the real question is which valves are Indy selling and can you do better than their price for the same quality of part. I don't know the answer to that but if I was buying valves I'd buy them from Manley rather than Indy. Or more likely, I'd call Porter Racing Heads and buy from him.