Put half in a 2.5 gal keg and half in bottles. Got 30-12oz bottles for about 2.8 gals in bottle.
Based on boiling 8.00 gallonsliters at 1.056 for 75 minutes, this will decrease your wort by 2.00 gallonsliters, bringing your after boil OG to 1.070. You wanted an OG of 1.075. It looks like it will be under.