I would run 2 to 1 gear ratio or so. Something like 40/20, 38/19...etc. As for Jetting, I have seen alot of Piped vipers burn down while using a tempa flow. You may consider disconnecting if you are going to jet down. As you know, Jetting can be tricky due to changing weather. Heat, humidity, altitude all come into play. I would run 130 mains on my SRX on the grass, compared to 147.5 in the winter. You could drop from say 147.5 to 137.5 and take a plug check. Take as many notes as possible with regards to temp, humidity...etc and keep for future records. Your jetting will need to be changed with temp changes of 10 degrees or so. If you want to run the Tempa Flow, call Jeff at CPR 414-698-6611 and he should have some input for you. Good Luck. OOhhh, Helix. almost forgot. Try a straight 47 for that distance. Throw helix at it until you cant pull it. What are you running for primary weights, springs...etc?...BBY