Need help decoding parts of my build sheet

Hello, I have a 1969 Dart Swinger 340, I'm curious to what day it was made, and after some research, the date would be where it says B30, but I have no clue to what month (I assume 30 is the 30th day). Also, if you fine folks would like to help me decode lines 3-5, it would be very appreciated.

Thanks in advance
Ryan