well between 9-1 to 10-1 is fine for most. 9.5-1 should stil be fine for you. YOU really don't want to know what mine was Hehehe But this may???
give you a clue lol I started out with a 307@ 12-1 had it fly cut.225 to clear the valves WITH a 194 head AND Yes i was useing 87oct. cheap stuff BIGGEST issue was turning it off. Other that IT ran fine NO ping and NO Pitting in the pistons or the head. But to go back and guess at it now It was somewhere between 13.9-1 to 15-1 Is the best guess Even from glen Self and yes this was my Daily driver and I ran a average 16 city with it.
with 3:08 gears and a 4speed And No it did not like below 45mph The cam would take over and the car would start to Lope/Leep/launge how ever yu want to look at But it wasn't happy Unless i held 3rd gear.