Hey guys. I want to start by saying that I have never fully rebuilt an engine. I have a briggs 3ho engine and would like it to be my first rebuild. I have seen a few posts on what mods to do as you rebuild these but I am struggleing to find pics of how the mods are done or pics of a step by step rebuild. Any help would be awesome! Also, are all of these engines the same or do I need to know model numbers n such to buy the correct gaskets and what not ( where are these numbers )