I agree the right piston always helps to make things optimum.
However in the real hot rod world , not everyone wants to spend the coin on different pistons or even has it to spend.
I know several guys with 383's using stealth heads and all their cars run well.
This day and age I feel that the cost of the cheap aluminum heads are a better deal then stock cast all day.
Plus stealthy look pretty much stock, paint them and they disguise nicely.
I have some stealthy that had a valve job done and minor working waiting for a new 383.
I'm confident it will pull hard and run well too.