Is 9.7:1 compression on iron heads too much for 91 octane

If I had a 318; rather, if I wanted My 318 to make a lil more power, after headers and a 4bbl, a 2800TC, an A500 and 4.10 gears;
I would do nothing but install a custom fast rate, low rpm, solid lifter cam, with enough valve spring to stretch the stock heads to 5200/5500.
But if I had OPs combo, I'd still get a custom solid-lifter cam, but just a lil later Ica,lol, to "bleed" off a lil pressure at low-rpm. Not too much, cuz you know that pressure is going back up into the intake , where it does zero good. And, I would put a modest amount of overlap on it. And I would ask the grinder if he can whack my tiny 318 valves open as fast as possible, hold them open there for as long as possible, and then slam them shut. And if he says I need to get a rev-limiter for 5200, well then, I'll get a rev-limiter. And if the valve gear needs a refresh every 30,000 miles, that's no big deal. And if the square-lobbed cam needs to be replaced every second or third summer, that's no big deal.
Cuz that combo is gonna put an ear to ear grin on my face that will be just about impossible to erase.
And you know what else?; a few months ago I purchased an old Offehauser DualPort from a FABO member here, with no particular plans for it. So.... I'd stick it on OPs combo with a BIG TQ I also found, lol.

The only thing I would try to do is get those domes up into the chambers for a really tight Q. Whatever it takes, I'm shootin' for mid .02s... POW!

But, with 360s now plentiful,.........