Hello:
Two points here and then i'm done.
1. DO not use steel gaskets with aluminum heads.
There will over time be a corrosive effect of the dissimmilar metals. How long of time and to what extent is unknown. But since you concerned with street reliabilty why chance anything.
2. Why use Studs instead of head bolts on a mild street engine? Perhaps i'm missing something here, but its seems to be overkill to me. Not sure what car this is going into and perhaps some one else has experience on this with B bodies. But a big block in a A body with studs makes the heads almost impossible to remove with engine in the car. Rember you now have to lift the heads off the studs. That means pulling the heads toward inner fenders, master cylinder, etc 5 or 6 inches. Voice of been there done that.

Anyway good luck with your project hope it works out for you.

Maynard