1970 Swinger Build Thread (PURISTS BEWARE)

Yes I am. And I've read where the remedy is typically thicker head gaskets. But it looks like since I'm going to have to buy new pistons anyways, maybe I have some options for compression ratio. Does anyone know the max static compression ratio for a 5.7 Hemi on 91 octane fuel? Obviously camshaft selection and timing have a huge affect on octane tolerance but I'm sure someone has a generally safe number they stick by
from what I researched on the LX swap forum, 10.5:1. Ethanol is also an option it appears. The head gaskets appear to be the simplest solution. One thing too, it appears that longer push rods will be needed if one does the Head gasket fix.