I pretty agree with everything millhouse has posted above.
Especially the part about the stock heads lifting.
Blow a HG without knowing it, and the coolant washes out the rings and all you have left is a pile of junk that burns 3 quarts of oil every time you get into the boost.
Its more reliable to have a car that makes maximum NA power with the addition of minimal boost, than it is to have a car that makes all it's power with boost.
I'd rather make 400rwhp with 4lbs than 400rwhp with 17lbs.
Boost kills HG's, that's not a myth. Blame it on whatever you want, tune, old gaskets, bad install, doesn't matter, it still happens.
And bentely, a turbo or SC on a stock short block typically produces low 12's correct?
So can a HCI setup.