[TransAm 474]

I don't intend to open a can of worms here, but just like the title says, how many people are succesfully running 10-1+ compression 400's with factory Iron Heads on 91 octane Pump Gas without any issue of pinging/detonation? I know Cliff and others have, where as others have not had success. I know this question will get conflicting answers from people's different experience, Im just curious as too how many are doing it without problem. Obviously a tight quench by Zero Decking, along with a well chosen camshaft with a later Intake Valve Closing point plays a big roll in making these work. I would also be interested in hearing from the people that DID NOT have success making it work, and details about the combination that didn't work, as far as Quench distance, Camshaft specs and so on.