Oil squirters can be a real advantage in a boosted engine. In the final years of the air cooled 911s oil cooling provided nearly 40% of the total cooling for the engine. Clearly the water cooled hemi doesn't require this level of oil cooling but the spraying the undersides of the pistons with oil would reduce the chance of detonation which is particularly important boosted applications.
I wonder if you could drill and tap the 5.7 block for squirters, and if it would be worth the effort.
Regards,
Joe Dokes