Another thought is if you really want to use the stamp steel rockers is to check them all and if you have eight that are close to each other and the other eight have more or less are close to each other on the preload than you want put them both on shafts and then shim the shaft that has the most preload to make it taller to lessen the preload
Many different ways to skin the kitty when you really want to
One other input, adjustable pushrods are a pain in the butt to adjust, especially on the center two cylinders on both heads on wedge motors with the motor assembled, it takes three wrenches and almost three hands