Rocker arm play

Spacers are fine for either. The existing spacers under the bolt heads can be moved around too.

I have not ever seen a spec in this for the stamped rockers BTW. And not trying to be obtuse, but there are much more likely causes for this tapping/ticking, so make sure you look at everything:
- a soft hydraulic lifter
- pushrods hitting the sides of the pushrods holes due to high lift (spacers could make this worse)
- retainers hitting the seals/stem guides for there same reason
- rocker hitting the baffle on the underside of the valve cover