Adjusting the oil pump is accomplished first by growing a third, reallly tiny hand on a double-jointed arm that can get under the air horns to get to the dang pump.
Barring that, Polaris makes a special tool that is bent in the right places to loosen the locking nuts and to turn the adjuster. I used a mirror to check all my IQ sleds to see if the marks align on the pump arm and the pump body. If they align, (all mine did) I left them alone. It's really difficult to get in there to change the adjustment. Some guys with the HO small block are removing the motor mount bolts and lifting the engine (with everything hooked up) to gain easier access to the adjuster.