You'll be fine with all of those components you listed off...I disagree with RRR about the T-line, run with the T. I used 2 gallons of near boiling distilled and 1 gallon room temp for my 3 rads. You should be fine with 2 gallons for flushing/cleaning and another gallon for your loop with plenty left over.

Start a thread if you have more questions though.

Best of luck!