If you intend on doing other mods in the future fit them, as they can be adjusted when/if needed later on.
You can also dial them each way to see if you can get any gains on the rolling road, but don't expect anything big from this, any power higher up for example is likely to be at the expense of lower down, but have a play and see what happens.
I once got a massive gain from a pinto std pulley after some numpty managed to set the cam timing TWO teeth out, luckily no damage!!
tabetha