easy way to tell if i got a solid cam or hydraulic?

ok, nublu, i understand what you are saying.

let me say it this way, and then you tell me where i am thinking wrong.lol

if a engine is bone stock, comming right out of another car, and i buy just a set of of mp roller rockers.

when i go to put them on the engine, what is the lash supposed to be set at?