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Yea, 84cc heads make it difficult with the majority of the kits. I'm between either:
80cc stealth heads with -27 dish pistons for a CR of 10:1 and dynamic of 8.4:1
or
84cc eddy heads with -17 dish pistons for a CR of 10.4:1 and dynamic of 8.8:1

10.4:1 is almost perfect but trying to figure out what octane fuel I would need to run.

Found this online, does this look valid? Would the ratio's change with my aluminum heads?
at 9:1 you can run 87 octane,
at 9.5:1 you can still run 87 octane
at 10:1 you need to go to 91 octane
at 10.5:1 you need 91 octane
at 11:1 you need to go to 92/93 octane

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You still need to look at the dynamic to say for sure
but on my 416 with 9.2 dynamic and iron heads I can
and do run on 87 on the street..I get ZERO knock..
if I want to run on the track I will add some 93...
you can add more with alum heads