Yes mine is factory air ride. The kit I used comes with about a 2" air bag spacer and replacement airbag sensor rods to raise the rear - so part of the rear lift comes from the spacer and part from the air bags themselves due to the replacement rods. Those rods have 3 adjustment settings - low/ medium/ high that can be used to fine tune the total rear lift. I have mine on the highest setting to give a very slight rake. Overall height to fin top is +/- 86.5" (with 37's).What did you use to raise the rear?? Is it factory air ride? What's total height of truck pavement to tip of shark fin?