Stock 1979 360 with Speedmaster head question

Krooser said
An MLS gasket requires a certain RA on the heads and block so.....

I had a conversation with my machinist this week about the surface ony block and heads. The mls meed a smoother surface than a composite gasket
This engine had run FP 1008 but is getting Cometics.

My advice? Don't mess with the engine. If it runs good why mess with it...I'll leave my opinion of those SM heads out of it.
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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.