It has 40mm valves, that's about all you need to know, other than the hydro/solid question. Checking the cam casting # will tell you a little more. Usually the letter suffix is between the #4 lobes.
Artwork that is only about wanting to be famous will never make you famous. Any fame is a bi-product of making something that means something. You don't go to a restaurant and order a meal because you want to have a shit. - Banksy