Half (2.5gal) in keg and half in bottles. Got 26 * 12oz bottles.
Based on boiling 7.49 gallonsliters at 1.047 for 70 minutes, this will decrease your wort by 1.75 gallonsliters, bringing your after boil OG to 1.058. You wanted an OG of 1.047. It looks like it will be over.