The reason long pushrods increase the rocker ratio is because the angle at which the adjuster goes through the rocker arm. The shorter the pushrod, the longer the adjuster. The longer the adjuster, the further away from the pivot the adjuster is. That reduces the rocker ratio. With Chrysler oiling the adjuster needs to be 9/32 out, plus .050 minus zero. Ok, it may be plus zero, minus .050 but I don’t have the book here to refresh my memory. Most guys run the pushrods way too short. If it’s a cup style adjuster I run them as far up the rocker as I can and still get oil to the adjuster.