The b20b and b20z are nearly identical blocks, but the head and intake manifolds are slightly different. You may find you have sensors with no plugs and plugs with no sensors. If you can, try and find an exact year (or, obd/generation of the engine) for a direct bolt in/plug in swap. Otherwise, you'll end up hacking to hack a few things-- which is fine, but only if you want to do so.