Are you stuck with that camshaft? It seems like rather than playing with your static compression ratio, you should just build your motor with the static compression ratio you want and then get the camshaft with the proper timing events you need to get the desired DCR.
I had an LT1 that had over 11:1 that ran on the crappy 91 Octane where I live. Granted it had a relatively large solid roller, but no issues.
David
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