This is my first engine... so help me out here. It's a first gen B16a. I have Helms for 90 integra.

For the main bearings, helms says to match the letters on the block with certain numbers on the crank. First off, the letters on the block were up-side down. That's normal right? Or am I reading them the wrong way?

Also, the 5'th or the 1'st main bearing identifier on the crank had the letter, and the number on it. B3 to be exact. But there is only supposed to be a number there. What's with that?