I have a Holley black pump, and the car is currently using the stock 5/16 fuel lines. I am putting a fuel cell in this week, and running braided hose. What size should I use? I was thinking -6 would be sufficient, but some say -8. Car has a 306 with 750 Holley dp. I will be running nitrous, but on a separate fuel cell and pump with good gas in it.