If you can find the felpro mls, and your surfaces are decent/not pitted or scratched, you’ll be fine.
I honestly think you would be fine with a felpro composition gasket. I strongly recommend studs. I used composition gaskets on mine with iron heads. At around 20 pounds of boost they would leave evidence of combustion lines on my firewall and back of the alternator, but never actually failed. Went with copper/ o ring when I switched to aluminum heads.
Caution with iron heads on a turbo b engine... the extreme heat swings will likely crack the cylinder heads externally in a horizontal line Just below the two center exhaust ports. If you suddenly develop coolant leaks, this is a likely source.