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