Salts CaSO4 3.2g, CaCl 2.0g plus a quarter tab campden. 3.5oz chocolate malt, 3.0oz acidulated.
Based on boiling 7.00 gallonsliters at 1.040 for 30 minutes, this will decrease your wort by 0.50 gallonsliters, bringing your after boil OG to 1.043. You wanted an OG of 1.049. It looks like it will be under.