Stock 1979 360 with Speedmaster head question

Yes it's the RA that had me ask the question in the first place. If and when I try aluminum heads I would probably stay away from MLS in my case. As to why mess with it? It runs good but could be better. I mean, why do we wrench on anything that runs good? A cylinder head swap is down the list of improvments, though.
In my usual "run what you got world" I would never bother with what RA the heads have... just drive it.

But in today's "perfection" world where everything must be perfect or I can't sleep, I guess I got a little carried away. I've seen so many race motors fixed with garbage can parts (and run GOOD) that I should have shut my pie hole.

Some if my fixes over the years makes UTG look like Dick Landy Enterprises.