Add whirlpool hops when wort cools to 185 after flame out and whirlpool for 20 minutes.
Based on boiling 6.50 gallonsliters at 1.046 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.053. You were planning on an OG of 1.053 so you are right on track. Nice job!