ok well im kinda new to the whole engine building thing so please dont bash me here , im just tryna learn more . everybody has been in my position before lol well i wanted to know what it means to "rebuild" an engine ? is it just replacing the internals on the long block and the head then putting it back together ? i understand that the block and head have to be machined and all that first . just tryna get some basic understanding. also what does it mean to port polish and bore the head of an engine? im asking all of this because i am going to be attempting a rebuild on a b18a engine . i pretty much got the engine for free so i dont mind workin on it and learning stuff. should be a fun little project. any help would be appreciated guys