Ok - I have a couple of questions.
You guys have years experience - I'm just an engine theorist crunching numbers.

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With 95cc chamber,
4.2cc piston relief
0 deck
cam intake closing at 68 degrees ABDC

Dynamic stroke = 2.88 in
Dynamic CR = 7.4:1

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With the 75cc chamber
4.2cc piston relief
0 deck
cam intake closing at 68 degrees ABDC

Dynamic Stroke = 2.88 in
Dynamic CR = 8.8:1

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Isn't a dynamic CR of 8.8:1 well within the pump gas range?
Thanks for the info to determine the piston to deck height given overall deck height.