irdprelude

what should you have done to an engine before placing it in your car? i need to find a new engine pretty soon so that i can get rid of my pos. thanks!
and if anyone can clerify the engine code for the jap spec b20 (confused due to seeing several people post different codes )
please don't flame, i really wish not to hear it. sorry if this is a dumb post. but any help will be appreciated!
thanks again!